Annoying niggle with my DB17.

Try a new Pinion gear or at least new set screw. I use no locktite and never had 4mm set screw pinion come off... Or try to mark where the pinion set screw sits when meshed right and make a small divit (sp?) on the motor shaft so it sits in a little hole and will be less likely to move...

And what body is that?

This is the third different pinion/grubscrew I have tried, all have the same issue. Body shell is an Alan Woodall fibreglass XL, it is so strong I can stand on it. Heavy though. May try the 'divit' idea, gotta be worth a shot.

A pinion puller will remove even the most stubborn pinion, so I think some CA glue would be one option- I like to apply a little blue threadloc ( tamiya stuff )to the actual motor shaft & then to the setscrew. Make sure you give it long enough to dry fully, and that should do the trick.

I've never had a pinion come loose on me before, I must be lucky..

Hmmm. Maybe i'll hit up some CA then. I have tried smearing everything in threadlock then leaving it over night to dry, no dice.