Team Losi Speed NT, Manual

12

Changing Gear Ratio

A 22-tooth clutch bell is mounted on the engine of your Speed-

NT. If you feel the need for greater speed an optional 23-tooth 

clutch bell (LOSA9391) can be fitted by following these steps. 

1.  Remove 4-40 screw attaching the pipe mount to the 

center brace. (Photo: SNT setting gear mesh 1

2.  Remove the throttle link from the carburetor.

3.  Remove the four 5-40 screws from the underside of the 

chassis [that secure the engine].

4.  Remove the screw from the end of the crankshaft making 

sure to save all shims and spacers.

5.  Remove the clutch bell, remove the two bearings and 

install them in the new clutch bell.

6.  Install the clutch bell onto the crank pilot shaft and replace 

the shims and cap screw.

7.  Replace the engine installing the four 5-40 screws from 

beneath as well as the throttle link and pipe mount screw.

Adjusting the Gear Mesh

As seen in the photo above, the motor can be moved forward 

and back to allow for multiple gear ratios and maintain a 

good gear mesh. You don’t want these gears too tight and you 

definitely don’t want them too loose.

1.  Slightly loosen the four 5-40 screws at the bottom of the 

chassis [that secure the engine]. 

2.  Slide the engine back so that the gears are meshing.

3.  Insert a piece of paper folded over double or a thin 

business card between the gears as seen in the photo (SNT 

setting the gear mesh 2).

4.  Tighten two of the four 5-40 mounting screws while 

applying slight pressure on the engine.

5.  Remove the paper and check the mesh. If the gears roll 

smoothly without binding or slapping back and forth 

retighten the other 5-40 screws. If not, start over at #1.