[Charlie]

I picked up a really cheap FLY viper today, seems very slow,  is there another quicker motor that will fit that comes with a long driveshaft for the front motor ?  Only ones I can find so far are same as is in, Mabuchi  I think . Or can the shaft be mated up to another one of higher rpm ?

[Kevan]

Bookmark Pendles website, there's loads of stuff there https://www.pendleslotracing.co.uk/spare...r_type=332

[Kevan]

I don't have a Viper but a quick google says it's a FK130 motor (short can), you'll have to keep the spring and shaft extension but motors are available https://www.pendleslotracing.co.uk/spare...r_type=331

[Charlie]

That’s great, I already have a scale auto motor on order for another project so might try that, I wasn’t sure how the shaft was extended and if it was transferable,  ?

[Kevan]

It's just a fairly tight fitting spring, when you lever it off make sure you keep it straight, if you kink the spring the axle will wobble at high revs.

[Charlie]

Pendle recommended a scale auto tech 1 20k motor, ordered and waiting for it, I got it for the fly chevron but might try it in viper first, then get another one of some sort, any suggestions for a good 20/21 motor ?

[Kevan]

Revoslot are great 21k motors 

...of course the best mod for one of those is a decent chassis and move the motor to the back end.  If it was mine I'd be fitting a SW pod and lightweight interior, but that's maybe some way down the road for you.