Gearing a 10.5 in a KF

[Wacker 3]

Hi Guys,

could you please advise what gearing I should use on a Speed Passion 10.5 with the kit spur?

Many Thanks,

Mark

[DNC]

Hi
I run 25t in my B5M with a 10.5 motor.
Not sure on the kf's gearing??

[Treedudeben]

It really depends on what spur gear your running.

There is a guide in the manual that's quite helpful.

I'm running a SP 10.5 with a 76T spur and a 26T pinion, I'm just about to try out a 28T as im hitting top speed about halfway down the straight at my local track.

I think the guide say the recommended pinion size for a 76T spur is 24T to 32T.

I'm new to this so learning as I go alone, I keep getting told that as long as I can hold my thumb on the motor after a race im not running it too hot.

However im also told that a motor will run hot if it's under geared as well as over geared.

Hope that helps. :thumbsup: