XX4 help

[rcracer]

hi all
i am going to running a xx4 with a dynasy 19 turn spec motor, purple spur, what size pinion should i use ? i will be running at york btw

[XXXCRRacer]

Probably a 18 or 19 pinion. The spur is an 84 tooth if I'm correct.

[losixxx]

only if you want the motor to go bang!!!!!!!!!
i used to run my dynasty on 82 spur 30 pinion so i would start off with 28 pinion

[rcracer]

cheers fella

[bigred5765]

19t spec i would say 82 or 84 spur 26-28 pinion would be a good starting point depends on the track may be as high as 30

[losixxx]

errr didnt i just post that