Pinions

[sldmodels]

I think my problem with the shark for a long time has been gearing, so after a long time trying to figure things out (and I am a very slow learner), I've ordered myself a 9 or 10 tooth pinion from RW (should hopefully have it and a newish speedo to have a setup and possibly a run at hereford on friday).

Silly question maybe, but just need something confirming. If I can't get a pinion small enough to stop my motor and speedo burning out, do I get a bigger or smaller spur gear?

(I have been offerend the lend of a 10 tooth pinion (thanks), but I want to get some testing doing before turning upto another national and going home with a dead car after practice).