Originally Posted by
desertrc
Does anyone know what pinion size will fit with the stock 80t spur? I am running a speed passion 17.5 citrux club stock with the verticle motor mount and 20t pulleys. I figured 38t pinion would get me my 4.0 FDR but that size does not fit. Any help would be great.
Someone a few pages back has made a FDR chart showing the clearance. I don't have the VMM but with the stock motor mount you can fit a 33t or perhaps a 34t (it's a tight fit, I wasn't comfortable with it). I think the VMM has a bit more room.