J&J Amusements King Scorpion User manual

Service Manual
Single & Double Go Karts (2018)
Published by J&J Amusements, Inc.
An Oregon Corporation
© 2018 J&J Amusements Inc. - All Rights Reserved
Specifications subject to change without notice.
2018

Important Safety Notice
Proper service and repair procedures are vital to safe, reliable operation of J&J go karts, as well as to the personal
safety of those performing the repairs. This manual outlines procedures for servicing and repairing J&J go karts, using
safe, effective methods. The procedures contain many NOTES, CAUTIONS and WARNINGS which should be followed
(along with standard safety procedures) to reduce the possibility of personal injury or improper service, which could
damage the go kart or compromise its safety.
It is important to note that repair procedures, techniques, tools and parts for servicing J&J go karts, as well as the skill
and experience of the individual performing the work, vary widely. It is not possible to anticipate all conceivable ways,
or conditions under which J&J go karts may be serviced, or to provide cautions to all possible hazards that may result.
Standard precautions should be used when handling toxic or flammable fluids, and safety goggles or other protection
should be used during cutting, grinding, chiseling, prying or any other process that can cause material removal or
projectiles. J&J recommends the use of safety goggles or approved glasses during all servicing of J&J go karts.
All information contained in this manual is based on the latest product information available at the time of printing.
We reserve the right to make changes at any time without notice. All rights reserved. Except as expressly provided
herein, no part of the manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any
storage medium, for any purpose, without prior written consent of J&J Amusements, Inc. An Oregon Corporation. J&J
Amusements, Inc. grants permission to download a single copy of this manual onto a hard drive or other electronic
storage medium to be viewed for personal use, provided that such electronic or printed copy of this manual contains
the complete text of this copyright notice. Any unauthorized commercial distribution of this manual is strictly
prohibited.
4897 Indian School Rd NE
Suite 150
Salem Oregon 97305-1126
www.jjamusements.com
Phone: [phone]
Toll Free Phone: [phone]
Fax: [phone]
Toll Free Fax: [phone]
JJ
&Amusements, Inc. TECHNICAL CONTACT INFORMATION
We value your feedback; technical comments and
suggestions are helpful to us. Please e-mail your
comments to [e-mail].
From time to time, updates may be made
to this manual. For the latest updates,
please visit our technical website at
http://jjamusements.com/technical/index.htm.
As you read this manual, you will find information that is preceded by a NOTE symbol. The purpose of this message is to
prevent damage to the go kart, other property, or the environment.
SAFETY MESSAGES
Your safety and the safety of others are very important. To help you make informed decisions, we have provided safety
messages and other information throughout this manual. Of course, it is not practical or possible to warn you about all of
the hazards associated with servicing a go kart. You must use your own good judgement.
You will find important safety information in a variety of forms, including:
SAFETY MESSAGES - preceded by a safety alert symbol and one of four signal words:
DANGER, WARNING, CAUTION, or SAFETY ITEM.
THESE SIGNAL WORDS MEAN:
DANGER..............................You WILL be KILLED or SERIOUSLY INJURED if you do not follow the subsequent instructions.
WARNING............................You CAN be KILLED or SERIOUSLY INJURED if you do not follow the subsequent instructions.
CAUTION................................................................... You WILL be INJURED if you do not follow the subsequent instructions.
SAFETY ITEM ... This safety device was installed at the factory and may be required by state, local, or ASTM standards.
INSTRUCTIONS - how to service these go karts correctly and safely.

To eliminate unnecessary work, careful reading of the applicable section is recommended before starting to service
a go kart. Photographs, diagrams, notes, cautions, warnings, and detailed descriptions have been included wherever
necessary. Nevertheless, even a detailed account has limitations; a certain amount of basic knowledge is also required
for successful work.
Especially note the following:
DIRT
Before removal and disassembly, clean the go kart. Any dirt entering the engine or other parts will work as an abrasive
and shorten the life of these parts. For the same reason, before installing a new part, clean offany dust or metal filings.
TIGHTENING SEQUENCE
Generally, when installing a part with several bolts, nuts or screws, start them all in their appropriate holes and tighten
them to a snug fit, then tighten them evenly in a cross pattern. This action will avoid distortion of the part. Conversely,
when loosening the bolts, nuts or screws, loosen each by a quarter turn, and then remove in a similar cross pattern.
Where there is a tightening sequence indication in this Service Manual, the bolts, nuts or screws must be tightened in the
order and method indicated.
TORQUE
When torque values are given in this Service Manual, use them. Either too little or too much torque may lead to serious
damage. Use a good quality, reliable torque wrench.
FORCE
Common sense should dictate how much force is necessary in assembly and disassembly. If a part seems especially
difficult to remove or install, stop and examine what may be causing the problem. Whenever tapping is necessary, tap
lightly using a wooden or plastic-faced mallet. Use an impact driver for screws (particularly for the removal of screws held
by a locking agent) in order to avoid damaging the screw heads. It also may be necessary to apply heat to some parts that
are held with a locking compound.
EDGES
Watch for sharp edges, especially during major motor/engine disassembly and assembly. Protect your hands with gloves
or a piece of thick cloth when lifting the motor/engine or turning it over.
HIGH-FLASH-POINT SOLVENT
A high-flash-point solvent is recommended to reduce fire danger. A commercial solvent commonly available in North
America is “standard solvent” (generic name). Always follow manufacturer and container directions regarding the use of
any solvent.
GASKET, O-RING
Do not reuse a gasket or O-ring once it has been in service. The mating surfaces around the gasket must be free of foreign
matter and perfectly smooth.
LIQUID GASKET, NON-PERMANENT LOCKING AGENT
Follow manufacturers’ directions for cleaning and preparing surfaces where these compounds will be used. Apply
sparingly, as excessive amounts may cause serious damage. An example of a non-permanent locking agent commonly
available in North America is Loctite® Lock’n Seal (Blue).
PRESS
A part installed using a press or driver, such as a wheel bearing, should first be coated with oil on its outer or inner
circumference so that it will go into place smoothly.
OIL SEAL AND GREASE SEAL
Replace any oil or grease seals that were removed with new parts, since removal generally damages seals. When pressing
in a seal containing manufacturer’s marks, press it in with the marks facing out. Seals should be pressed into place using
a suitable driver (which contacts evenly with the side of the seal) until the face of the seal is even with the end of the hole.
Always use assembly oil or grease on the lip (sealing edge) of any seal prior to assembly.

CIRCLIP, RETAINING RING
Replace any removed circlips and retaining rings with new ones, as removal weakens and deforms them. When installing
circlips and retaining rings, take care to compress or expand them only enough to install them and no more.
COTTER PIN
Replace any cotter pins that were removed with new ones, since removal deforms and breaks them.
REPLACEMENT PARTS
When there is a replacement instruction, replace these parts with new ones every time they are removed. Removed parts
will be damaged and/or lose their original function.
INSPECTION
When parts have been disassembled, visually inspect these parts for the following conditions or other damage (If there is
any doubt as to their condition, replace them with new parts):
Abrasions, cracks, hardening, warping, bends, dents, scratches, wear, color changes, deterioration, seizure.
SPECIFICATIONS
Specification terms are defined as follows:
“Standards”: Show dimensions or performances which brand-new parts or systems have.
“Service Limits”: Indicate the usable limits. If measurement shows excessive wear or deteriorated performance, replace
the damaged parts.

phone: [phone] | 1-503-304-8899 fax: [phone] | 1-503-304-1899 www.jjamusements.com
0GENERAL DATA AND
MAINTENANCE.
1TUBES, TIRES, RIMS
2FRAME, BUMPERS,
NERF BARS
3FRONT HUBS,
SPINDLES
4STEERING SYSTEM
5ROLL BARS, PADS,
SEATBELTS
6AXLE, AXLE COVER,
DRIVE SYSTEM
COMPONENTS
7BRAKE SYSTEM
8ENGINE, CLUTCH,
ENGINE MOUNTED
ACCESSORIES
Specifications....................................................... 0-1
Scheduled maintenance .................................... 0-8
Service schedule - gas ........................................ 0-9
Service schedule - electric................................0-11
Maintenance records .......................................0-12
Pre-opening checklist - gas ..............................0-13
Pre-opening checklist - electric .......................0-14
Go-kart track area checklist.............................0-15
Non-scheduled maintenance record..............0-16
Work order tags ................................................ 0-17
How a warranty is processed ..........................0-20
Product return procedures..............................0-20
Limited warranty...............................................0-21
Cleaning go-karts ..............................................0-22
Unloading go-karts ...........................................0-23
Initial setup ........................................................0-26
Tube & rim information .................................... 1-1
Frequent questions ........................................... 1-2
Rotating tires ...................................................... 1-2
Disc-lock lug nuts ...............................................1-3
Wheel removal ................................................... 1-5
Changing tires & tubes...................................... 1-6
Tire & wheel inspection .................................. 1-10
Troubleshooting tires...................................... 1-11
Frequent questions (frame) ............................. 2-1
Frequent questions (bumper) ......................... 2-2
Bumper & D-rubber removal...........................2-3
Nerf bar removal................................................ 2-5
Steering system..................................................4-1
Caster...................................................................4-3
Toe-in ...................................................................4-6
Tie rods/ends......................................................4-8
Ackerman effect ............................................... 4-10
Steering shaft & cover..................................... 4-11
Steering wheel..................................................4-12
Steering column pad ....................................... 4-13
Engine overview............................................ 8-1
Grabber plate .....................................................8-3
Engine assembly removal.................................8-4
Engine-mounted items .....................................8-6
Hour meter schematic (without kartrol)....... 8-7
Hour meter schematic (with kartrol).................8-8
Tiny tach schematic...........................................8-9
Clutch/reduction rebuild................................ 8-14
Overview ............................................................. 7-1
Caliper assembly................................................ 7-3
Brake pads - removal & installation ...............7-4
Removing brake caliper assembly ................. 7-5
Master cylinder overview................................. 7-9
Master cylinder removal................................. 7-10
Brake pedal ....................................................... 7-13
Brake fluid level inspection............................ 7-14
Brake fluid change ........................................... 7-14
Bench-bleeding master cylinder................... 7-15
Bleeding the brake system............................. 7-17
Brake troubleshooting.................................... 7-18
Drum brake system overview........................ 7-19
Drum brake parts identification ...................7-20
Changing brake shoes..................................... 7-21
Drum brake adjustments ............................... 7-27
Frequent questions ........................................... 5-1
Roll bar (Eagle, Scorpion, Can-Am, F-22, Sidekick) ... 5-2
Rollbar(Sidewinder, Sidewinderdouble).................. 5-3
Seat back pads....................................................5-4
Fixing pads ..........................................................5-6
Seatbelts.............................................................. 5-7
Cleaning seatbelts .............................................5-9
Overview .............................................................6-2
Axle cover............................................................6-3
Drive cover ..........................................................6-4
Drive belt .............................................................6-6
Drive hub........................................................... 6-11
Drive pulley ....................................................... 6-12
Floater hub........................................................ 6-14
Axle bearing overview ....................................6-16
Bearings............................................................. 6-17
Axle - single drive............................................. 6-19
Axle - two-wheel drive ....................................6-26
Drive sprocket spreadsheet...........................6-27
Frequent questions (hubs & spindles) ......................... 3-1
Front hub removal .............................................3-3
Spindle .................................................................3-4
Tapered spindle & roller bearings....................3-5
Spindle dissassembly........................................3-8
Spindle assembly ...............................................3-9

Specifications and prices subject to change without notice. Download latest update to this manual on-line.
9FUEL TANK &
EMISSION SYSTEM
10 THROTTLE,
CABLE, PEDAL
11 CARBURETOR
12 BODY, BODY
MOUNTS, DECALS
13 ELECTRICAL SYSTEM
Overview ............................................................. 9-1
Remote fuel tank removal................................9-2
Remote fuel tank bracket removal .................9-3
Engine-mounted fuel tank removal................9-4
Fuel cap/vent ......................................................9-5
Evaporative system ...........................................9-6
Evaporative system maintenance...................9-7
Evaporative system routing.............................9-9
Overview ........................................................... 11-1
Identifying carburetor items ......................... 11-3
Carburetor check sheet................................11-7
Frequent questions .........................................13-2
Basic electrical troubleshooting ...................13-4
Voltage drop testing ........................................ 13-7
Testing fuse.......................................................13-8
Wire schematic .................................................13-9
Battery pack....................................................13-10
Battery pack testing ...................................... 13-11
Battery pack replacement............................ 13-12
Fuse .................................................................. 13-13
Relay ................................................................. 13-17
Linear throttle potentiometer .....................13-20
Throttle cable .................................................13-27
Throttle cable adjustment............................13-29
Motor controller.............................................13-32
Interconnect board........................................13-36
Switch box ...................................................... 13-44
Switch box testing......................................... 13-45
Remote shutdown wire harness .................13-52
Testing flash codes ........................................13-54
Controller flash faults ...................................13-58
Overview ........................................................... 12-1
Body mounts (F-22) ......................................... 12-3
Eagle body panels............................................ 12-5
Warning decals ................................................. 12-7
Body seal ......................................................... 12-12
FPX is “The Tire Store” for
concession go kart tires. We carry
only the best and most popular
sizes.
We stock so many tires we have
another warehouse on the east
coast! That’s right, we have a
warehouse in Atlanta, Georgia
and one at our headquarters in
Salem, Oregon!
5” TIRE/TUBE COMBINATION DEALS
Part# Description Price
007880COMBO Tire, 12 x 4.00 - 5” SL72 Bigfoot COMBO (W/Tube) $22.99
007880 Tire, 12 x 4.00 - 5” SL72 Bigfoot (TIRE ONLY NO TUBE!) $21.99
1-20-0037 Tire, 11 x 3.60 - 5” SL72 736HD $22.99
Quantity discounts available on 007880COMBO. QTY 100+ $21.99, 500+ $20.99
4” TIRES
Part# Description Price
1-20-0054 Tire, 4.10/3.50 - 4” SL72 738HD $15.80
TIRES - OTHER
Part# Description Price
1-60-0009 Tire, 10 x 4.50 - 5” SL72 739 Race Style Slick $16.50
1-20-0064 Tire, 11 x 4.50 - 5” SL72 739 Race Style Slick $18.99
1-60-0008 Tire, 11 x 7.10 - 5” SL72 739 Race Style Slick $39.99
TIRES - FALCON
Part# Description Price
1-60-0185 Tire, 4.10/3.50-5 4-ply Falcon Electric King Nob Style $18.99
1-20-0037 Tire, 11 x 3.60 - 5” SL72 736HD $22.99
Throttle cable ...................................................10-1
Throttle cable routing (bodied go-kart).......10-2
Throttle cable routing (eagle go-kart) ..........10-3
Throttle cable removal....................................10-5
Throttle cable lubrication...............................10-6
Throttle cable/speed adjustment .................10-7
Throttle pedal removal ...................................10-9
Throttle pedal bushings................................10-10

0-1
SPECIFICATIONS
phone: [phone] | 1-503-304-8899 fax: [phone] | 1-503-304-1899 www.jjamusements.com
SPECIFICATIONS: GAS-POWERED DOUBLES
DOUBLE SEAT GO KARTS, KING SCORPION, SIDEWINDER DOUBLE, F-22 DOUBLE, SIDEKICK, DOUBLE EAGLE
DIMENSIONS
Overall length ...................................................................................................................................................................... 82”(208 cm)
Overall width......................................................................................................................................................................... 55” (139cm)
Overall height.......................................................................................................................................................................40” (101 cm)
Wheel base.....................................................................................................................................................................44.125” (112cm)
Ground clearance....................................................................................................................................................................2.5” (6cm)
Fuel capacity .............................extra-capacity fuel tanks available, model dependent, 2.2, 3.3, 3.5 or 4.75 gallon capacities
ENGINE
Model .........................................................................................................................Honda™ GX160k1, GX200, GX240k1, GX270k1
Type ......................................................................................................... 4-stroke, overhead valve, single cylinder, inclined by 25°
Cooling system ........................................................................................................................................................................ forced air
Starting system....................................................................................................................................... recoil, optional electric start
Spark plug..................................................................................................................................................bpr6es (ngk), w20epr-u (nd)
Lubrication system .......................................................................................................................................................................splash
DRIVE TRAIN
Clutch type .................................................................................................................................................. centrifugal, wet multi-disc
Clutch engagement/lock .......................................................................................................engagement 1800 rpm/lock 2200rpm
Final drive system ...................................................................................................................................520 X ring hd chain, cog belt
FRAME
Type .............................................................................................................................................................................................. unitized
Coatings ............................................................................................... phosphate dipped and electrostatic powder-coated 425°f
Steering angle ............................................................................................................................................................. 24° to either side
Caster ..................................................................................................................................................................... adjustable, 0° to 14°
Tires.........................................................................................................................................................5” extended-wear pneumatic
Brake type .............................................................................................(self-adjusting) hydraulic disc, optional mechanical drum
KING SCORPION SIDEWINDER DOUBLE F-22 DOUBLE
SIDEKICK DOUBLE EAGLE

0-2
SPECIFICATIONS
Specifications and prices subject to change without notice. Download latest update to this manual on-line.
SPECIFICATIONS: GAS-POWERED SINGLES
SINGLE SEAT GO KARTS, SCORPION, SIDEWINDER, F-22, CAN-AM, EAGLE
DIMENSIONS
Overall length ......................................................................................................................................................................82”(208 cm)
Overall width.........................................................................................................................................................................45” (114cm)
Overall height...................................................................................................................................................................... 40” (101 cm)
Wheel base.....................................................................................................................................................................44.125” (112cm)
Ground clearance....................................................................................................................................................................2.5” (6cm)
Fuel capacity ............................ extra-capacity fuel tanks available, model dependent, 2.2, 3.3, 3.5 or 4.75 gallon capacities
ENGINE
Model ........................................................................................................................ Honda™ GX160k1, GX200, GX240k1, GX270k1
Type .........................................................................................................4-stroke, overhead valve, single cylinder, inclined by 25°
Cooling system ........................................................................................................................................................................forced air
Starting system.......................................................................................................................................recoil, optional electric start
Spark plug................................................................................................................................................. bpr6es (ngk), w20epr-u (nd)
Lubrication system .......................................................................................................................................................................splash
DRIVE TRAIN
Clutch type .................................................................................................................................................. centrifugal, wet multi disc
Clutch engagement/lock ...................................................................................................... engagement 1800 rpm/lock 2200rpm
Final drive system .................................................................................................................................. 520 X ring hd chain, cog belt
FRAME
Type ..............................................................................................................................................................................................unitized
Coatings .............................................................................................. phosphate-dipped and electrostatic powder-coated 425°f
Steering angle .............................................................................................................................................................24° to either side
Caster ..................................................................................................................................................................... adjustable, 0° to 14°
Tires........................................................................................................................................................ 5” extended-wear pneumatic
Brake type .............................................................................................(self-adjusting) hydraulic disc, optional mechanical drum
CAN-AM
SCORPION EAGLE
SIDEWINDER F-22

0-3
SPECIFICATIONS
phone: [phone] | 1-503-304-8899 fax: [phone] | 1-503-304-1899 www.jjamusements.com
SPECIFICATIONS: ELECTRIC -POWERED DOUBLES
DOUBLE GO KARTS, SIDEWINDER DOUBLE, DOUBLE EAGLE
DIMENSIONS
Overall length .......................................................................................................................................................................82”(208 cm)
Overall width......................................................................................................................................................................... 55” (139cm)
Overall height....................................................................................................................................................................... 40” (101 cm)
Wheel base..................................................................................................................................................................... 44.125” (112cm)
Ground clearance.................................................................................................................................................................... 2.5” (6cm)
MOTOR
Model ................................................................................................................................................................................................. D&D
Type ................................................................................................................48vdc, separately excited, 48vdc permanent magnet
Cooling system .........................................................................................................................................................................forced air
Maximum horsepower............................................................................................................................................... 18.6 hp (13.9 kw)
Controller....................................................................................................................................................................................... sevcon
Speed controller ........................................................................................................................................................................... sevcon
Power .................................................................................................................. 48 vdc qty 4 (12 volts blue/yellow optima battery)
............................................................................................................................................870 amps cold cranking amps per battery
................................................................................................................................................. 120 amps reserve capacity per battery
DRIVE TRAIN
Clutch type ............................................................................................................................................................................ direct drive
Forward/reverse..................................................................................................................................................................................yes
High/low (optional).......................................................................................................................................................yes, with Kartrol
Final drive system ...................................................................................................................................520 X ring hd chain, cog belt
FRAME
Type .............................................................................................................................................................................................. unitized
Coatings ............................................................................................... Phosphate-dipped and electrostatic powder-coated 425°f
Steering angle ............................................................................................................................................................. 24° to either side
Caster ......................................................................................................................................................................adjustable, 0° to 14°
Tires......................................................................................................................................................... 5” extended-wear pneumatic
Brake type .............................................................................................................................................. (self-adjusting) hydraulic disc
SIDEWINDER DOUBLE - ELECTRICDOUBLE EAGLE - ELECTRIC

0-4
SPECIFICATIONS
Specifications and prices subject to change without notice. Download latest update to this manual on-line.
SPECIFICATIONS: ELECTRIC-POWERED SINGLES
SINGLE SEAT GO KARTS, SIDEWINDER, EAGLE
DIMENSIONS
Overall length .......................................................................................................................................................................82”(208 cm)
Overall width..........................................................................................................................................................................45” (114cm)
Overall height....................................................................................................................................................................... 40” (101 cm)
Wheel base..................................................................................................................................................................... 44.125” (112cm)
Ground clearance.................................................................................................................................................................... 2.5” (6cm)
MOTOR
Model ................................................................................................................................................................................................. D&D
Type .................................................................................................................48vdc separately excited, 48vdc permanent magnet
Cooling system .........................................................................................................................................................................forced air
Maximum horsepower............................................................................................................................................... 18.6 hp (13.9 kw)
Controller....................................................................................................................................................................................... sevcon
Speed controller ........................................................................................................................................................................... sevcon
Power .................................................................................................................. 48 vdc qty 4 (12 volts blue/yellow optima battery)
............................................................................................................................................870 amps cold cranking amps per battery
................................................................................................................................................. 120 amps reserve capacity per battery
DRIVE TRAIN
Clutch type ............................................................................................................................................................................ direct drive
Forward/reverse..................................................................................................................................................................................yes
High/low (optional).......................................................................................................................................................yes, with Kartrol
Final drive system ...................................................................................................................................520 X ring hd chain, cog belt
FRAME
Type .............................................................................................................................................................................................. unitized
Coatings ............................................................................................... phosphate-dipped and electrostatic powder-coated 425°f
Steering angle ............................................................................................................................................................. 24° to either side
Caster ......................................................................................................................................................................adjustable, 0° to 14°
Tires......................................................................................................................................................... 5” extended-wear pneumatic
Brake type .............................................................................................................................................. (self-adjusting) hydraulic disc
SIDEWINDER - ELECTRICEAGLE ELECTRIC