Slayer
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35
TRAnSMISSIon TUnInG
Adjusting the Slipper Clutch
Your Slayer is equipped with
an adjustable Torque-Control
™
slipper clutch. The slipper clutch is
integrated into the main spur gear
on the transmission. The slipper
clutch is adjusted by loosening
the spring-loaded locknut on the
slipper shaft. Use the supplied
8mm open-end metric wrench. To
tighten or loosen the slipper nut,
insert the 2.0mm hex wrench into the hole in the
end of the slipper shaft. This locks the shaft for adjustments.
Turn the adjustment nut clockwise to tighten (less slippage) and
counter-clockwise to loosen (more slippage). The slipper clutch has
two functions:
1.
Limiting the engine’s torque output to the wheels to prevent
wheelspin on low traction surfaces and help to prevent damage
to the gears in the transmission during on-throttle landings.
2.
Protecting the drivetrain from sudden impact or shock loads (such
as landing from a jump with the engine at full throttle).
From the factory the slipper clutch is set for minimal slippage, just
enough to protect the drivetrain from shock loads. On slippery, low
traction surfaces such as a hard-packed, dry racetrack you may benefit
from loosening the slipper adjustment nut to allow for more clutch
slippage. This will make the truck easier and more forgiving to drive
by helping to reduce the amount of wheel spin. Loosening the slipper
adjustment can also improve performance on extreme high traction
surfaces by preventing the front end from lifting off of the ground when
accelerating. Make slipper adjustments in small 1/8 turn increments.
The maximum tight setting for the slipper is just at the point where
there is little or no tire slippage on a high traction surface such as
carpet or a prepared racetrack. The slipper should not be tightened
to the point that clutch slippage is completely eliminated. Do not
overtighten the slipper nut or you could damage the slipper bearings,
pressure plates, or other components.
Adjusting the Two-Speed Transmission
Slayer comes equipped with an adjustable two-speed transmission.
When the shift point on the transmission is adjusted correctly, it will
maximize acceleration and improve drivability. Use a 2mm hex wrench
to adjust the shift point. To make the adjustment, the engine must be
off (not running).
1.
Shift the transmission into forward
gear (shift button down).
2.
Remove the rubber access plug from
the top of the transmission housing.
3.
While looking through the opening,
rotate the spur gear to align the
cutout (notch) on the internal two-
speed clutch drum with the opening.
4.
Hold the spur gear and slowly roll the
truck forward until the hex on the
black adjustment set screw becomes
visible in the opening.
Note:
the truck
will only roll forward (not backwards)
when the spur gear is held stationary.
5.
Insert the 2.0mm hex wrench
through the clutch drum and into
the adjustment screw.
6.
Turn the adjustment screw 1/8 turn
counter clockwise to lower the shift
point (shifts sooner). Be careful not to
loosen the adjustment screw too much
or you may cause the screw and spring
to fall out (requiring major disassembly
and repair). Turn the adjustment screw
clockwise for later shifts.
7.
Reinstall the rubber access plug to prevent dirt from entering the
transmission. Do not put oil or other lubricants into the transmission
through the two-speed adjustment access.
8.
Check performance by running a test lap after each adjustment. On
a small race track with many tight turns, try setting the shift point
later so that the truck only shifts into second gear on the main
straightaway. This will prevent an unexpected shift in the middle of
a turn. On larger tracks it may be necessary to allow earlier shifts for
increased speed.
Basic Tuning Adjustments
Shift
Sooner
