I think the LRP's run hot anyway, I run a 5.5t SP V2 motor on a 20t pinion with 96t spur indoors without any problems.
However just make sure that the drive train is free, the motor bearings are also free.
What speedo are you running? Could you turn down the setting on that?
Rather than go to a 10.5 why not got for a quicker motor with less timing advance/boost
|