APRILIA TUONO V4 R a-PRC ABS Guide

SERVICE STATION MANUAL
2Q000037
TUONO V4 R a-PRC ABS

SERVICE STATION
MANUAL
TUONO V4 R a-PRC ABS
THE VALUE OF SERVICE
As a result of continuous updates and specific technical training programmes for Aprilia products, only
Aprilia Official Network mechanics know this vehicle fully and have the specific tools necessary to carry
out maintenance and repair operations correctly.
Thereliabilityofthevehiclealsodependsonitsmechanicalconditions.Checkingthevehiclebeforeriding
it, its regular maintenance and the use of original Aprilia spare parts only are essential factors!
For information on the nearest Official Dealer and/or Service Centre consult our website:
www.aprilia.com
Only by requesting aprilia original spare parts can you be sure of purchasing products that were
developed and tested during the actual vehicle design stage. All aprilia original spare parts undergo
quality control procedures to guarantee reliability and durability.
Thedescriptionsandimagesinthispublicationaregivenforillustrativepurposesonlyandarenotbinding.
While the basic characteristics as described and illustrated in this booklet remain unchanged, Piaggio &
C.S.p.A. reservesthe right,at anytime andwithout beingrequired toupdate thispublication beforehand,
to make any changes to components, parts or accessories, which it considers necessary to improve the
product or which are required for manufacturing or construction reasons.
Notallversions/modelsshowninthispublicationareavailableinallcountries.Theavailabilityofindividual
models should be confirmed with the official aprilia sales network.
The Aprilia trademark is the property of Piaggio & C. S.p.A.
© Copyright 2013 - Piaggio & C. S.p.A. All rights reserved. Reproduction of this publication in whole or
in part is prohibited.
Piaggio & C. S.p.A. Viale Rinaldo Piaggio, 25 - 56025 PONTEDERA (PI), Italy
www.piaggio.com

SERVICE STATION MANUAL
TUONO V4 R a-PRC ABS
This manual provides the main information to carry out regular maintenance operations on your vehicle.
This manual is intended to aprilia Dealers and their qualified mechanics; several concepts have been
deliberately omitted as they are considered unnecessary. As it is not possible to include complete
mechanical notions in this manual, users should have basic mechanical knowledge or minimum
knowledge about the procedures involved when repairing scooters. Without this knowledge, repairing or
checking the vehicle may be inefficient or even dangerous. As the vehicle repair and check procedures
are not described in detail, be extremely cautious so as not to damage components or injure individuals.
In order to optimise customer satisfaction when using our vehicles, aprilia s.p.a. commits itself to
continually improve its products and the relative documentation. The main technical modifications and
changes in repair procedures are communicated to all aprilia Sales Outlets and its International
Subsidiaries.These changeswill beintroduced inthe subsequenteditions ofthe manual.In caseof need
or further queries on repair and check procedures, consult aprilia CUSTOMER DEPARTMENT, which
will be prepared to provide any information on the subject and any further communications on updates
and technical changes related to the vehicle.
NOTE Provides key information to make the procedure easier to understand and carry out.
CAUTION Refers to specific procedures to carry out for preventing damages to the vehicle.
WARNING Refers to specific procedures to carry out to prevent injuries to the repairer.
Personal safety Failure to completely observe these instructions will result in serious risk of personal
injury.
Safeguarding the environment Sectionsmarked with thissymbol indicatethe correctuse of thevehicle
to prevent damaging the environment.
Vehicle intactness The incomplete or non-observance of these regulations leads to the risk of serious
damage to the vehicle and sometimes even the invalidity of the guarantee

INDEX OF TOPICS
CHARACTERISTICS CHAR
SPECIAL TOOLS S-TOOLS
MAINTENANCE MAIN
TROUBLESHOOTING TROUBL
ELECTRICAL SYSTEM ELE SYS
ENGINE FROM VEHICLE ENG VE
ENGINE ENG
POWER SUPPLY P SUPP
SUSPENSIONS SUSP
CHASSIS CHAS
BRAKING SYSTEM BRAK SYS
COOLING SYSTEM COOL SYS
BODYWORK BODYW
PRE-DELIVERY PRE DE

INDEX OF TOPICS
CHARACTERISTICS CHAR

Rules
Safety rules
Carbon monoxide
If you need to keep the engine running while working on the vehicle, please ensure that you do so in
an open or very well ventilated area. Never run the engine in an enclosed area. If you do work in an
enclosed area, make sure to use a fume extraction system.
CAUTION
EXHAUSTEMISSIONSCONTAINCARBONMONOXIDE,A POISONOUSGASWHICHCANCAUSE
LOSS OF CONSCIOUSNESS AND EVEN DEATH.
Fuel
CAUTION
FUEL USED TO DRIVE EXPLOSION ENGINES IS HIGHLY INFLAMMABLE AND CAN BECOME
EXPLOSIVE UNDER SPECIFIC CONDITIONS. IT IS THEREFORE RECOMMENDED TO CARRY
OUT REFUELLING AND MAINTENANCE PROCEDURES IN A VENTILATED AREA WITH THE EN-
GINE SWITCHED OFF. DO NOT SMOKE DURING REFUELLING OR NEAR FUEL VAPOUR. AVOID
ANY CONTACT WITH NAKED FLAME, SPARKS OR OTHER HEAT SOURCES WHICH MAY
CAUSE IGNITION OR EXPLOSION.
DO NOT ALLOW FUEL TO DISPERSE INTO THE ENVIRONMENT.
KEEP OUT OF THE REACH OF CHILDREN.
Hot parts
The engine and the exhaust system components get very hot and remain in this condition for a certain
time interval after the engine has been switched off. Before handling these components, make sure that
you are wearing insulating gloves or wait until the engine and the exhaust system have cooled down.
Coolant
The coolant contains ethylene glycol which, under certain conditions, can become flammable.
When it burns, ethylene glycol produces an invisible flame which however can cause burns.
CAUTION
TAKE PARTICULAR CARE NOT TO SPILL COOLANT ONTO HOT PARTS OR THE ENGINE AND
EXHAUST SYSTEM; THE FLUID MAY CATCH FIRE AND BURN WITH INVISIBLE FLAMES. WHEN
CARRYING OUT MAINTENANCE OPERATIONS, IT IS ADVISABLE TO WEAR LATEX GLOVES.
WHILE POISONOUS, COOLANT HAS A SWEET TASTE WHICH MAKES IT EXTREMELY AP-
PEALING TO ANIMALS. NEVER LEAVE COOLANT IN OPEN CONTAINERS WHERE IT MAY BE
REACHED AND DRUNK BY AN ANIMAL.
TUONO V4 R a-PRC ABS Characteristics
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KEEP OUT OF THE REACH OF CHILDREN.
NEVER REMOVE THE RADIATOR CAP WHILE THE ENGINE IS STILL HOT. COOLANT IS UNDER
PRESSURE AND MAY CAUSE BURNS.
Used engine oil and transmission oil
CAUTION
WHEN CARRYING OUT MAINTENANCE OPERATIONS, IT IS ADVISABLE TO WEAR PROTEC-
TIVE IMPERMEABLE GLOVES.
THE ENGINE OR GEARBOX OIL MAY CAUSE SERIOUS INJURIES TO THE SKIN IF HANDLED
FOR PROLONGED PERIODS OF TIME AND ON A REGULAR BASIS.
WASH YOUR HANDS CAREFULLY AFTER HANDLING OIL.
HAND THE OIL OVER TO OR HAVE IT COLLECTED BY THE NEAREST USED OIL RECYCLING
COMPANY OR THE SUPPLIER.
DO NOT DISPOSE OF OIL IN THE ENVIRONMENT
KEEP OUT OF THE REACH OF CHILDREN.
THE BRAKE FLUID MAY DAMAGE PAINTED, PVC OR RUBBER SURFACES. WHEN SERVICING
THE BRAKING SYSTEM, PROTECT THESE COMPONENTS WITH A CLEAN CLOTH. ALWAYS
WEAR PROTECTIVE GOGGLES WHEN SERVICING THE BRAKING SYSTEM. THE BRAKE FLUID
IS EXTREMELY DANGEROUS TO THE EYES. IN THE EVENT OF ACCIDENTAL CONTACT WITH
THE EYES, RINSE THEM IMMEDIATELY WITH PLENTY OF COLD, CLEAN WATER AND SEEK
MEDICAL ADVICE.
KEEP OUT OF THE REACH OF CHILDREN.
Battery electrolyte and hydrogen gas
CAUTION
THE BATTERY ELECTROLYTE IS TOXIC, CORROSIVE AND AS IT CONTAINS SULPHURIC ACID,
IT CAN CAUSE BURNS WHEN IN CONTACT WITH THE SKIN. WHEN HANDLING BATTERY
ELECTROLYTE, WEAR TIGHT-FITTING GLOVES AND PROTECTIVE APPAREL. IN THE EVENT
OF SKIN CONTACT WITH THE ELECTROLYTIC FLUID, RINSE WELL WITH PLENTY OF CLEAN
WATER. IT IS PARTICULARLY IMPORTANT TO PROTECT YOUR EYES BECAUSE EVEN TINY
AMOUNTSOF BATTERY ACIDMAYCAUSEBLINDNESS.IF THE FLUID GETSINCONTACTWITH
YOUR EYES, WASH WITH ABUNDANT WATER FOR FIFTEEN MINUTES AND CONSULT AN EYE
SPECIALIST IMMEDIATELY. THE BATTERY RELEASES EXPLOSIVE GASES; KEEP IT AWAY
FROM FLAMES, SPARKS, CIGARETTES OR ANY OTHER HEAT SOURCES. ENSURE ADE-
QUATE VENTILATION WHEN SERVICING OR RECHARGING THE BATTERY.
KEEP OUT OF THE REACH OF CHILDREN.
BATTERY LIQUID IS CORROSIVE. DO NOT POUR OR SPILL ON PLASTIC COMPONENTS IN
PARTICULAR. ENSURE THAT THE ELECTROLYTIC ACID IS COMPATIBLE WITH THE BATTERY
BEING ACTIVATED.
Maintenance rules
GENERAL PRECAUTIONS AND INFORMATION
When repairs, disassembly and reassembly of the vehicle is carried out, follow the following recom-
mendations strictly.
BEFORE DISASSEMBLING COMPONENTS
Characteristics TUONO V4 R a-PRC ABS
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•Remove the dirt, mud, dust and foreign objects from the vehicle before disassembling com-
ponents. Wherever required, use the special tools designed for this vehicle.
DISASSEMBLING COMPONENTS
•Do not loosen and/or tighten the screws and nuts using pliers or other tools, but always use
the specific wrench.
•Mark the positions on all the connection joints (hoses, cables, etc.) before separating them
and identify them with different distinctive marks.
•Each piece should be clearly marked in order to be identified during the installation phase.
•Carefully clean and wash the disassembled components with detergents with a low flam-
mability grade.
•Keep the coupled parts together because they have "adapted" to one another following
normal wear.
•Some components must be used together or replaced entirely.
•Keep away from heat sources.
REASSEMBLING COMPONENTS
CAUTION
BEARINGS MUST ROTATE FREELY, WITHOUT JAMMING AND/OR NOISE, OTHERWISE, THEY
NEED TO BE REPLACED.
•Only use ORIGINAL Aprilia SPARE PARTS.
•Comply with lubricant and consumables use guidelines.
•Lubricate parts (whenever possible) before reassembling them.
•Whentighteningnuts andscrews,start eitherfrom thecomponentswith thelargestdiameter
or from the innermost components, proceeding diagonally. Tighten nuts and screws in suc-
cessive steps before applying the tightening torque.
•Always replace self-locking nuts, washers, sealing rings, circlips, O-rings (OR), cotter pins
and screws with new parts if the thread is damaged.
•When assembling the bearings, make sure to lubricate them well.
•Check that each component is assembled correctly.
•After a repair or routine maintenance, carry out pre-ride checks and test the vehicle on
private grounds or in an area with low traffic.
•Clean all mating surfaces, oil seal rims and gaskets before refitting. Smear a thin layer of
lithium-based grease on the oil seal rims. Reassemble oil seals and bearings with the brand
or batch number facing outward (visible side).
ELECTRICAL CONNECTORS
Electric connectors must be disconnected as described below; failure to comply with this procedure
causes irreparable damage to both the connector and the wiring harness:
Press the relative safety clips, if applicable.
TUONO V4 R a-PRC ABS Characteristics
CHAR - 9

•Grip the two connectors and disconnect them by pulling them in opposite directions.
•If any signs of dirt, rust, moisture, etc. are noted, clean the inside of the connector carefully
with a jet of compressed air.
•Ensure that the cables are correctly fastened to the internal connector terminals.
•Then connect the two connectors, ensuring that they couple correctly (if fitted with clips, you
will hear them "click" into place).
CAUTION
DO NOT DISCONNECT CONNECTORS BY PULLING THE CABLES.
NOTE
THE TWO CONNECTORS CAN ONLY BE CONNECTED IN ONE DIRECTION: CONNECT THEM
THE RIGHT WAY ROUND.
TIGHTENING TORQUES
CAUTION
IF UNSCREWING A SELF-LOCKING NUT, IT MUST BE REPLACED WITH A NEW ONE.
CAUTION
REMEMBER THAT THE TIGHTENING TORQUE FOR ALL THE FIXING ELEMENTS LOCATED ON
WHEELS, BRAKES, WHEEL AXLES AND OTHER SUSPENSION COMPONENTS PLAY A FUN-
DAMENTAL ROLE IN GUARANTEEING THE SAFETY OF THE VEHICLE AND MUST BE KEPT AT
THE PRESCRIBED VALUES. REGULARLY CHECK THE TIGHTENING TORQUE OF THE FIXING
ELEMENTS AND ALWAYS USE A TORQUE WRENCH WHEN REFITTING. IF THESE WARNINGS
ARE NOT OBSERVED, ONE OF THESE COMPONENTS COULD LOOSEN AND COME OFF,
BLOCKING A WHEEL OR CAUSING OTHER PROBLEMS THAT WOULD COMPROMISE MA-
NOEUVRABILITY, LEADING TO A CRASH WITH THE RISK OF SERIOUS INJURY OR EVEN
DEATH.
Running-in
Runningthe engine in correctly isessential forensuring enginelongevity andfunctionality. Twistyroads
and gradients are ideal for running in the engine, brakes and suspension effectively. Vary your riding
speed during the running in period. This ensures that components operate in "loaded" conditions and
then "unloaded" conditions, allowing the engine components to cool.
CAUTION
THE FULL PERFORMANCE OF THE VEHICLE IS ONLY AVAILABLE AFTER THE SERVICE AT
THE END OF THE RUNNING IN PERIOD.
Follow the guidelines detailed below:
•Do not twist the throttle grip abruptly and completely when the engine is working at a low
revs, either during or after run-in.
•During the first 100 Km (62 miles) use the brakes gently, avoiding sudden or prolonged
braking. That is to permit the adequate adjustment of the pad friction material to the brake
discs.
•It is recommended, during the first 1000 km (621 mi), not to exceed 7500 rpm and 9500 rpm
up 2000 km (1243 mi).
AFTER THE SPECIFIED MILEAGE, TAKE YOUR VEHICLE TO AN Official Aprilia Dealer FOR THE
CHECKS INDICATED IN THE "RECOMMENDED PRODUCTS" TABLE IN THE SCHEDULED MAIN-
Characteristics TUONO V4 R a-PRC ABS
CHAR - 10

TENANCE SECTION TO AVOID INJURING YOURSELF, OTHERS AND /OR DAMAGING THE
VEHICLE.
Vehicle identification
Frame number
The frame number is stamped on the right hand
side of the headstock.
This number consists of numbers and letters, as in
the example shown below.
ZD4TYB0200YSXXXXXX
KEY:
ZD4: WMI (World manufacturer identifier) code;
TY: model;
B02/B03: variant version (170CV / 78 KW);
0: free digit;
Yyear of manufacture;
S: production plant (S= Scorzè);
XXXXXX: serial number (6 digits);
FRAME NUMBER
The frame number is stamped on the right hand
side of the headstock.
ENGINE NUMBER
The engine number is printed on the base of the
engine crankcase, left hand side.
Engine No. ....................
Dimensions and mass
WEIGHT AND DIMENSIONS
Specification Desc./Quantity
Max. length 2,065 mm (81.30 in)
Max. width 820 mm (32.28 in)
Max. height (at handlebar) 1,090 mm (42.91 in)
Saddle height 826 mm (32.52 in)
Wheelbase 1,445 mm (56.89 in)
Minimum ground clearance 125 mm (4.92 in)
Dry weight 195 kg (429 lb)
Kerb weight 206 kg (454 lb)
TUONO V4 R a-PRC ABS Characteristics
CHAR - 11

Specification Desc./Quantity
Full loaded weight (rider only) 281 kg (619 lb)
Engine
ENGINE
Specification Desc./Quantity
Model V4
Type 65° longitudinal V-4, 4-stroke, 4 valves per cylinder, double
overhead camshafts.
Engine capacity 999 cm³ (60.96 cu in)
Bore / stroke 78 mm / 52.26 mm (3.07 in / 2.06 in)
Compression ratio 13 : 1
Engine idle speed 1,500 ± 100 rpm
Engine revs at maximum speed 12,300 ± 100 rpm
Clutch Multi plate wet clutch with mechanical control lever on left side
of the handlebar. Anti-juddering and slipper clutch systems
Start-up Electric
Timing system Morse chain on intake camshaft, cam to cam gear, bucket tap-
pets and valve clearance adjustments with calibrated pads
Acceptable values with control clearance between cam and
valve intake: 0.10 - 0.15 mm (0.0039 - 0.0059 in) exhaust: 0.20 - 0.25 mm (0.0079 - 0.0098 in)
Lubrication Wet sump with oil radiator
Oil pump Dual trochoidal pump (lubrication + cooling)
Oil filter With external cartridge filter
Cooling Liquid
Cooling system 3-way thermostatic valve, cooling radiator with electric fan and
expansion tank
Coolant pump Centrifugal bearingless aspirating pump with integrated ce-
ramic gasket
Air filter Paper
Alternatively:
Air filter In cotton
Transmission
GEAR RATIOS
Specification Desc./Quantity
Primary drive ratio 44 / 73 (with gears)
Drive ratio, 1st gear 15 / 39 (secondary)
Drive ratio, 2nd gear 16 / 33 (secondary)
Drive ratio, 3rd gear 20 / 34 (secondary)
Drive ratio, 4th gear 22 / 32 (secondary)
Drive ratio, 5th gear 26 / 34 (secondary)
Drive ratio, 6th gear 27 / 33 (secondary)
Final drive gear ratio 16 / 42
TRACTION CONTROL
Specification Desc./Quantity
a-PRC system (on vehicles with a-PRC) (Aprilia Performance Ride Control), which includes traction
control,wheeliecontrol,launchcontrolandclutchlessgearshift
functions.
Capacities
CAPACITY
Specification Desc./Quantity
Fuel tank (reserve included) 18.5 l (4.07 UKgal; 4.88 US gal)
Characteristics TUONO V4 R a-PRC ABS
CHAR - 12

Specification Desc./Quantity
Fuel tank reserve 4 l (0.88 UK gal; 1.06 US gal)
Engine oil oil and filter change 4 l (0.88 UK gal)
Coolant 2.6 l (0.57 UK gal)
Seats 2
Maximum weight capacity 195 kg (429 lb)
Drive chain
DRIVE CHAIN
Specification Desc./Quantity
Type 525
With sealed master link
Model Regina 110 links
Electrical system
ELECTRICAL SYSTEM
Specification Desc./Quantity
Spark plugs NGK CR9EKB
Electrode gap 0.7 - 0.8 mm (0.027 - 0.031 in)
Battery YUASA YT12A-BS, 12 V 9.5 Ah
Coils Stick coil
Recharging system Flywheel with rare earth magnets
Alternator 450 W
Main fuses 30 A
Secondary fuses 5A - 7.5A - 15A
ABS fuses 15A - 30A
BULBS
Specification Desc./Quantity
High beam/low beam light 12 V - 55 W H7
Front daylight running lights LED
Turn indicators 12V - 10W (White light)
Rear daylight running light /stop light LED
License plate light 12 V - 5 W
WARNING LIGHTS
Specification Desc./Quantity
High beam light LED
Right turn indicator LED
Left turn indicator LED
General warning LED
Gear in neutral LED
Side stand down LED
Fuel reserve LED
ABS LED (WHERE ACTIVE)
Frame and suspensions
CHASSIS
Specification Desc./Quantity
Type Aluminium, dual beam chassis with pressed and cast sheet el-
ements.
Steering rake 27°
TUONO V4 R a-PRC ABS Characteristics
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SUSPENSION
Specification Desc./Quantity
Front fork Sachs upside-down stems One by One, adjustable hydraulic
operation, stems diam 43 mm (1.69 in).
Front wheel travel 120 mm (4.72 in)
Rear shock absorber With progressive linkage with APS system. Sachs piggy-back
shock absorber adjustable with spring preloading, hydraulic
brake compression and rebound damping.
Rear wheel travel 130 mm (5.12 in)
SIZES A AND B
Specification Desc./Quantity
Size "A" 654.5 mm (25.76 in) (measurements refer to the bare chassis)
Size "B" 339.5 mm (13.36 in) (measurements refer to the bare chassis)
Brakes
BRAKES
Specification Desc./Quantity
Front Double floating disc, Ø 320 mm (12.60 in), radially-mounted
calliper with four Ø 32 mm (1.26 in) pistons and two calliper
pads. Brake pipe in metal braid.
Rear disc brake -220 mm diam. (8.66 inches), 2-piston callipers - 32
mm diam. (1.25 inches) - pump with built-in tank and metal
braid pipe.
Wheels and tyres
WHEEL RIMS
Specification Desc./Quantity
Front wheel rim 3.50 x 17"
Rear wheel rim 6.00 x 17"
TYRES
Specification Desc./Quantity
Tyre model Pirelli DIABLO Rosso Corsa
Michelin Power Pure
Metzeler RACETEC K3
Pirelli Diablo Super Corsa SP
Front tyre 120/70 ZR17 (58W)
Inflation pressure 1 passenger: 2.3 bar (230 KPa) (33.36 PSI)
2 passengers: 2.5 bar (250 KPa) (36.26 PSI)
Rear tyre 190/55 ZR17 (75W)
200/55 ZR17 (78W) (*)
Characteristics TUONO V4 R a-PRC ABS
CHAR - 14

Specification Desc./Quantity
190/50 ZR17 (73W)
(*) With these dimensions use only Pirelli Diablo Super-
corsa SP tyres.
Inflation pressure 1 passenger: 2.5 bar (250 KPa) (36.26 PSI)
2 passengers: 2.8 bar (280 KPa) (40.61 PSI)
Supply
FUEL SUPPLY
Specification Desc./Quantity
Fuel Unleaded petrol max E10 (95 RON)
FUEL SUPPLY SYSTEM
Specification Desc./Quantity
Throttle body diameter 48 mm (1.89 in)
Type Electronic injection (multipoint), 2 throttle bodies motorised
(ride by wire), 2 dynamic air intakes. Selectable multimap.
Tightening Torques
Chassis
Front side
OIL RADIATOR
pos. Description Type Quantity Torque Notes
1 Screws fastening oil radiator to
mounting bracket M6 1 7 Nm (5.16 lb ft) -
TUONO V4 R a-PRC ABS Characteristics
CHAR - 15

FRONT FORK - SACHS
pos. Description Type Quantity Torque Notes
1TEFL screw (fasten onto Fork Hubs) M6x40 4 10 Nm (7.37 lb ft) -
2 Screw (Piston fixing to the stem
base) - 2 30 Nm (22.13 lb ft) -
3 Upper cap - 2 20 Nm (14.75 lb ft) -
4 Upper cap locking nut - 2 20 Nm (14.75 lb ft) -
- Speed sensor bracket screw M5x12 1 0.6 Nm (0.44 lb ft) -
Characteristics TUONO V4 R a-PRC ABS
CHAR - 16

STEERING
pos. Description Type Quantity Torque Notes
1 Screws fastening the raiser to the
steering upper yoke M10 2 50 Nm (36.87 lb ft) -
2 Screws fastening upper U-bolt to
handlebar M8 4 25 Nm (18.43 lb ft) -
3 Upper plate stem fastening screws M8 2 25 Nm (18.44 lb ft) -
4 Lower plate stem fastening screws M8 4 25 Nm (18.44 lb ft) -
5 Headstock counter-lock ring M35x1 1 Manual +35° Bend the tabs into
the notches in the
lock ring
6 Headstock lock ring M35x1 1 40 ± 5 Nm (29.50 ± 3.69
lb ft) Bend the tabs into the notches in the
lock ring
- Steering damper fastening screw - 2 10 Nm (7.37 lb ft) Loctite 243
FRONT WHEEL
Pos. Description Type Quantity Torque Notes
1 Front wheel pin nut M25x1.5 1 80 Nm (59.00 lb ft) -
2 Front brake disk fastening screws M8 6 + 6 30 Nm (22.13 lb ft) Loct. 243
TUONO V4 R a-PRC ABS Characteristics
CHAR - 17

FRONT BRAKE CALLIPER
Pos. Description Type Quantity Torque Notes
1Front brake calliper fastening screws M10x1.25 2 + 2 50 Nm (36.88 lb ft) -
FRONT BRAKE PUMP
pos. Description Type Quantity Torque Notes
1Screw fastening front brake fluid res-
ervoir to bracket M6 1 7 Nm (5.16 lb ft) -
Characteristics TUONO V4 R a-PRC ABS
CHAR - 18

pos. Description Type Quantity Torque Notes
2Screw fastening brake fluid reservoir
mounting bracket to handlebar M6 1 7 Nm (5.16 lb ft) -
3Screw fastening brake pipe grommet
to the lower yoke M5 1 8 Nm (5.90 lb ft) -
4 Front brake pump U bolt clamp M6 2 10 Nm (7.37 lbf ft) -
5 Front brake lever pin fixing screw M6 1 10 Nm (7.37 lbf ft) -
HANDLEBAR AND CONTROLS
pos. Description Type Quantity Torque Notes
1Anti-vibrationcounterweight fastener M6 1 10 Nm (7.37 lb ft) -
2 Throttle control fixing screw M5 2 6 Nm (4.42 lbf ft) -
3 Left light switch M5 2 2 Nm (1.47 lbf ft) -
4 Mirror supporting pin M10 2 40 Nm (29.50 lb ft) -
5 Mirror supporting nut M16x1 2 40 Nm (29.50 lb ft) -
6 T.C. control fastening screw M4 1 2 Nm (1.47 lbf ft) -
TUONO V4 R a-PRC ABS Characteristics
CHAR - 19

FRONT HEADLAMP
pos. Description Type Quantity Torque Notes
1 Screws fastening the headlamp to
the upper fairing fastener M5 2 3 Nm (1.47 lb ft) -
2 Screws fastening headlamp to front
fairing M5 4 4 Nm (2.95 lb ft) -
Characteristics TUONO V4 R a-PRC ABS
CHAR - 20