Pinion and spur gear advice
 

Nejust bought my first Yokomo Yz2 CA
My RC knowledge is very limited, the spur gear and pinion doesn’t look very well matched, I’m currently running a 10.5 motor, the pinion is a 48p 19T, to me the sour gear looks a bit used.

Or am I wrong and just need to mesh it better, I haven’t ran it yet, nor spent any time meshing it as I thought it may need replacing.

http://www.oople.com/forums/picture....pictureid=7565

I'm not convinced that's a kit spur. I've known of slipper issues when using off-brand spur gears, due to thickness. kit spur us 80 tooth.

Kit pinion is a 22 tooth, which is fine for 7.5/6.5 motors.
With a 10.5 turn, you want to be at a 24/25 really.

Tbh I don’t think it would be a kit spur, the guy I bought it off has changed a few bits, of which he’s given me lots of spares, I would like to work out what’s the standard bits etc then put it back to stock.

I’ll get a new pinion, the car has different arms (gul arms) is this a good idea to keep it put back to stock?

Depends on the tract surface you run on really. The gull arms are currently run on both high and low grip as they offer more corner speed. Ensure you have the gull front tower too.

Predominantly run on high grip carpet, the tower has been changed and has the appropriate one for the arms

http://www.oople.com/forums/picture....pictureid=7566

http://www.oople.com/forums/picture....pictureid=7567

Yeah you have the newer arms on it. stick with those for sure.

Would you recommend anything else?

After sorting the spur gear, just run it and get it tuned to the track you are running on. you could spend more money on it on new bits, but run it as is not now and see what it does.

Ok perfect thanks, I’m gonna run 35 in the front shocks and 40 in the back with 6k oil in the diff

That spur looks a bit worn actually, tips of the teeth shouldn't be THAT flattened off.