Losi LOSB0084 Manual - Manual (Page 7)

Page 7
Maintenance
In addition to the service needs pointed out in this guide, you should try to maintain your new 8IGHT 2.0 RTR for
proper performance and to prevent wear. If dirt gets in the moving parts it can seriously hinder the performance
of the model. Use compressed air, a soft paintbrush and/or toothbrush to remove dirt and dust. Avoid using
solvents, if possible, as this can actually wash the dirt into bearings and areas not accessible without disassembly,
causing additional wear. We suggest you follow these basic guidelines.
• Remove as much freestanding dirt and dust as noted above.
• Never leave fuel in the tank for more than a couple of hours.
• When done running for the day or longer, let the engine run out of fuel. Remove the air cleaner and
pour small amount WD40 or quality after-run engine oil into the carburetor and spin the engine over
a few seconds.
• If needed, replace the air cleaner before installing it back on the model.
• Inspect the chassis for worn, broken, or binding parts and repair as necessary.
Servicing the Clutch
The 8IGHT 2.0 RTR comes with a 2-shoe aluminum clutch that needs to be maintained periodically for optimum
performance. You will notice that when the vehicle is new the acceleration will be very linear: the sound of the
engine increasing in rpm will equal as the vehicle increases in speed. Once you find that your acceleration is
decreased but the engine rpm is
higher than before, it is probably
time for a new clutch. On the right is
a picture of a new clutch. This is how
the clutch shoes look prior to running
the vehicle.
Below is a used clutch. You will
notice the edges of the shoes
are “mushroomed” over. Generally the more that the shoes are
“mushroomed” over the more the shoes are worn.
Whenever you need to rebuild your clutch we recommend the
following tips. First of all, be sure to clean all parts with Losi Nitrotec ™
Spray Cleaner (LOSA99217) to ensure there is no oil or debris on any
of the parts. Cleaning will include all the clutch parts including the clutch bearings. We like to spray out the clutch
bearings to ensure that there is no grease slung from the bearings at high rpm which would cause premature
clutch wear or slippage. When reinstalling the clutch
pins we recommend NOT using any type of Losi-Lok or
threadlocking compound on the clutch pins. By using Losi-
Lok on this part, it only makes it difficult to remove the pins.
Once the new shoes are installed, pull back each clutch
shoe 1mm to make sure they spring back into position to
ensure proper movement. You will also want to make sure
the clutch bell has anywhere from .25mm to .50mm of free
play from side-to-side and spins freely on the crankshaft.
You can use Losi’s Metric Shim Set (LOSA6356) to dial this in
properly. Now that your clutch is rebuilt it is time to break it
in. This is done by starting your buggy and having it idling
on the ground. While firmly holding the vehicle down on the ground, apply 1/2 throttle for three seconds. Repeat
this three times to fully seat in your new clutch.
The flywheel that holds the clutch shoes is capable of using a 4-shoe clutch. If you are interested in trying new
clutch setups, check page 38 in the 8IGHT 2.0 Race Roller Manual that is included with your vehicle.
Wear on
clutch shoes
Used clutch with
slight wear
New Clutch
Clutch Shoe Removal
In order to remove your clutch shoes
from the flywheel, remove these two
screws with a 1/16-inch hex wrench.