Originally Posted by Trips

Or, you can dremel the motor... Not my first choice, but with the Tekin Redline being a few mm longer and no taper at the endbell I couldn't get even close... Even dremeling the inner pin mount wasn't enough... by the time I got enough material off the pin mount to fit a 118/53, there wasn't enough left of it to hold the ball in place...

The Xcelorin and Trinity motors I had in the car were both shaped just fine and required no dremeling to get a 118/53 in the car, but my Xcelorin is a 10.5, and the 17.5 Trinity that I borrowed from Alex last time out was busy in his Speedmerchant today... so with no prs adapter handy, this is the result...

warning: it might be a good idea to check for ROAR legality (or whatever rules are in place where you race)