THUNDER TIGER SLEDGE HAMMER S50 Manual page 17

Optional Gearing
Additional gearing is available for your SLEDGE HAMMER S50 Monster Truck. Additional gearing allows you to match your engine
and transmission to your driving situation. Bigger gears on the clutch bell (or smaller slipper gears) will result in greater top speed,
but will have slower acceleration from a stop (see chart below). If you change the gearing you will need to reset the gear mesh:
1. Loosen (or tighten if engine was removed) the four engine mounting bolts located on the underside of the truck until you can
just slide the engine forward and backward.
2. Slide the engine up to the spur gear until the teeth on the clutch bell are meshed tightly with the teeth on the slipper gear.
3. Move the engine back a little bit (1/32" or 0.8mm). Check the mesh by holding the smaller gear with one hand and rocking the
bigger gear back and forth with the other. The big gear should rock back and forth slightly with little effort. A gear mesh that is
too tight will be noisy, have lower performance and could ruin the gears.
SLEDGE HAMMER S50
1.
2.
Clutch bell gear size Slipper Gear size
20T (Std.)
PN1805
23T
PN1808
0.8mm
Final Reduction
1st Gear
49T(TT-Std)
PD7215 19.924
49T(TT-Std)
PD7215 17.325
Final Reduction
2nd gear
Better
13.78
Acceleration
Higher Top
Speed
11.98