40 20 revo gearing on jato....

[viseversa101]

i bought the 40 pinion 20 clutch bell setup for a revo and put on my jato, had to move the engine a little closer for it to mesh so i moved it. I could not figure out why it was grinding or how to fix it and thought okay I will run it n break it in n maybe it will clear itself up. Dumb idea, now i stripped my pinion. How do I fix it? It had no problem stock, is there something I missed?

[Snook Man]

The (pinion) as you called it, I’m assuming is a revo spur gear which is a mod 1 pitch, the most common 20T clutch bells are mod .8 and the 2 different pitches do not mesh together and a plastic spur would strip every time.
Are you sure you have a mod 1, 20T clutch bell and not a 20T mod .8 bell?

Otherwise if you have the same pitch bell and spur you just need to make more modifications of the engine position to adjust the mesh properly.

[viseversa101]

Local store carries 1.0 40t revo spur n thats what i stripped, so i put the stock .8 54t jato spur on n it meshes perfectly, so i assume my 20t clutchbell is a .8 not 1.0 n caused the mesh to not line up properly. So the solution is to find a .8 40t spur which im not finding, or a 1.0 20t clutchbell to mesh with the local stores stocked 1.0 40t spur. But i cant find it, any suggestions on the setup or links to what someone else uses wouldbe great

[Jersey Jato]

I use a Robinson racing cb for the Revo. I couldn't find a traxxas one.

[viseversa101]

U use 20 40 or 16 40 kit

[Jersey Jato]

I use 20/40 gears.

[viseversa101]

Got a link?

[Snook Man]

RRP part # 8020 is the bell your looking for.

[viseversa101]

I have that bell snook, just not a 40t spur that fits, I've heard of numberous choices but haven't found a reliable 40. A stock 54t .8 mod works fine. But was interested in other compatible setups using a 20t clutchbell

[Snook Man]

The stock revo spur gears are all mod I, 36/38/40T
If you have the rrp 8020 it will mesh. The rrp 7920 is a mod .8 pitch and will not.


Have a look at your bell, a mod 1 20T bell the diameter of the gear teeth will be close to the outer edge of the bell like the pic above.
A mod .8 20T gear will be a lot smaller in diameter.