Team Losi XXX-BK2 User manual

Take your time and pay close attention to detail. Keep this manual for future reference.
Team Losi, A Division of Horizon Hobby inc.,
4710 East Guasti R ., Ontario CA 91761
Phone: [phone] / Fax: [phone]
(web) www.TeamLosi.com / (email) [e-mail]
BK2 OWNER'S MANUAL
1/10 Scale 2wd Electric Off-Road Racing Buggy
P/N - 800-0214
J.A. . - M.D.B.
11/01/2003
MADE IN THE UNITED STATES OF AMERICA
Carefully read through all instructions to familiarize yourself with the parts, construction
technique, and tuning tips outlined in this manual. Being able to grasp the overall design of
your new XXX-BK2 racing buggy before begining the construction process will ensure a
smooth assembly.

When all else fails, read the
instructions.
For the latest setup tips and information on your
new XXX-BK2, visit Team Losi on the Internet at:
www.TeamLosi.com

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Welcome Team Losi XXX-BK2 Owner!
Thank you for choosing the Team Losi XXX-BK2. I have been fortunate to work and race for Team Losi through the years. I owe
a great deal of my success to their cutting edge designs and attention to detail. The Team Losi XXX-BK2 kit includes a large
selection of the more important specialty parts I used to win many ROAR Modified Wheel Drive National Championships.
Before you start building your new XXX-BK2, I suggest you read through the instructions first. Be sure to check out the perfor-
mance tips as you build and the tuning tips at the back of this manual as well. I hope you enjoy your XXX-BK as much as I do
mine.
Good luck, and thank you for choosing Team Losi.
1. INTRODUCTION
T IPLE-X KINWALD, EDITION 2, COMPLETED KIT DIMENSIONS
Length: 14.875" Front Width: 9.8 " Rear Width: 9.84" Height: 5.1 5"
Wheelbase: 10.6" All dimensions at ride height. Weight will vary depending on accessories.
NOTES & SYMBOLS USED
Step A-1
This is a common step sequence foun at the beginning of
each new illustration throughout the manual.
q1. Each step throughout the entire manual has a check box to
the left of it. As you complete each step, mark the box with a check. If
you nee to take a break an return to buil ing at a later time, you will
be able to locate the exact step where you left off.
*NOTE: This is a common note. It is use to call attention to
specific etails of a certain step in the assembly.
IMPORTANT NOTE: Even if you are familiar with Team
Losi kits, be sure an pay attention to these notes. They point out
very important etails uring the assembly process. Do not ignore
these notes!
The Team Losi icon esignates a performance tip. These tips
are not necessary, but can improve the performance of your
XXX-BK2 car.
In illustrations where it is important to note which irection
parts are facing, a helmet like this one will be inclu e in the illustra-
tion. The helmet will always face with a river's perspective. Any ref-
erence to the right or left si e will relate to the irection of the helmet.
KIT/MANUAL O GANIZATION
The kit is compose of ifferent bags marke A through G. Each bag
contains all of the parts necessary to complete a particular section of
the kit. Some of these bags have subassembly bags within them. It is
essential that you open only one bag at a time an follow the correct
assembly sequence, otherwise you may face ifficulties in fin ing the
correct part. It is helpful to rea through the instructions for an entire
bag prior to beginning assembly. Key numbers (in parentheses) have
been assigne to each part an remain the same throughout the manual.
In some illustrations, parts which have alrea y been installe are not
shown so that the current steps can be illustrate more clearly.
For your convenience, an actual-size har ware i entification
gui e is inclu e with each step. To check a part, hol it against the
silhouette until the correct part is i entifie . In some cases extra har -
ware has been supplie for parts that may be easy to lose.
The mol e parts in the kit are manufacture to eman ing tol-
erances. When screws are tightene to the point of being snug, the
parts are hel firmly in place. For this reason it is very important that
screws not be overtightene in any of the plastic parts.
To ensure that parts are not lost uring construction, it is rec-
ommen e that you work over a towel or mat to prevent parts from
rolling away.
IMPO TANT SAFETY NOTES
1. Select an area for assembly that is away from the reach of
small chil ren. Some parts in this kit are small and can be swallowed
by children causing choking and possible internal injury.
2. The shock flui an greases supplie shoul be kept out of
chil ren's reach. They are not intended for human consumption!
3. Exercise care when using any han tools, sharp instruments,
or power tools uring construction.
4. Carefully read all manufacturers' warnings and cautions for
any glues, chemicals, or paints that may be use for assembly an
operating purposes.

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TOOLS EQUI ED
Team Losi has supplie all necessary Allen wrenches an a special wrench that is nee e for assembly an a justments. The following common
tools will also be require : Nee le nose pliers, regular pliers, hobby knife, scissors or other bo y cutting/trimming tools, an a sol ering iron
may be necessary for ra io installation. 3/16", 1/4", 11/32", an 3/8" nut rivers are optional.
ADIO/ELECT ICAL
A suggeste ra io layout is provi e in this manual. Your high performance R/C center shoul be consulte regar ing specific questions
pertaining to ra io/electrical equipment.
HA DWA E IDENTIFICATION
When in question, use the har ware i entification gui e in each step. For screws, the prefix number esignates the screw size an number of
threa s per inch (i.e., 4-40 is #4 screw with 40 threa s per inch). The secon number or fraction esignates the length of the screw. For Cap Hea
an Button Hea Screws, this number refers to the length of the threa e portion of the screw. For Flat Hea Screws, this number refers to the
overall length of the screw. Bearings an bushings are reference by the insi e iameter x outsi e iameter. Shafts an pins are referre to by
iameter x length. Washers are escribe by insi e iameter or the screw size that will pass through the insi e iameter. E-clips are size by the
shaft iameter that they attach to.
MOTO S AND GEA ING
The XXX-BK2 inclu es an 78-tooth, 48-pitch Kevlar spur gear. The overall internal rive ratio of the transmission is 2.56:1. The pinion gear that
is use will etermine the final rive ratio. To calculate the final rive ratio, first ivi e the spur gear size by the pinion gear size. For example,
if you are using a 21-tooth pinion gear, you woul ivi e 78 (spur gear size) by 21 (pinion gear size) 78/21=3.71. This tells you that 3.71 is the
external rive ratio. Next, multiply the internal rive ratio (2.56) by the external rive ratio (in this case 3.71). 2.56 x 3.71 = 9.50. This means that
by using a 21-tooth pinion gear with a 78-tooth spur gear, the final rive ratio is 9.50:1.
Consult your high-performance shop for recommen ations to suit your racing style an class. The chart below lists some of the more
common motor types an a recommen e initial gearing for that motor. Ratios can be a juste epen ing on various track layouts, tire sizes,
an battery types.
RECOMMENDED INITIAL GEARING FOR COMMON MOTORS
TYPE OF MOTOR PINION SPUR
24o Stock 20-22 78
10-Turn Mo ifie 19 78
11-Turn Mo ifie 20 78
12-Turn Mo ifie 21 78
13-Turn Mo ifie 22 78
14-Turn Mo ifie 23 78
15-Turn Mo ifie 24 78
16-Turn Mo ifie 25 78
Team Losi is continually changing and improving designs; therefore, the actual part may appear slightly different than the illustrated part. Illustrations of parts and
assemblies may be slightly distorted to enhance pertinent details.
TABLE OF CO TE TS
1. INTRODUCTION .................................................................... i
Complete Kit Dimensions .................................................... i
Notes & Symbols .................................................................. i
Kit Manual Organization ....................................................... i
Important Safety Notes ......................................................... i
Tools Require ..................................................................... ii
Ra io/Electrical .................................................................... ii
Har ware I entification ........................................................ ii
Recommen e Gearing ......................................................... ii
2. BAG A .................................................................................. 1-2
3. BAG B .................................................................................. 3-7
4. BAG C ................................................................................ 8-11
5. BAG D ............................................................................. 12-1
6. BAG E ............................................................................. 20-23
7. BAG F ................................................................................... 24
8. BAG G ............................................................................. 25-30
. Checklist Before Your First Run ......................................... 31
10. Tips From the Team ........................................................ 31-33
11. Spare Parts List ............................................................. 34-36