gearing
i dont use a setting plate or a washer on all 4 of my sharks and never had any problems with meshing or motor coming loose
on my novak mongoose 8.5 i have 12/49 and same on the rest, except one i have 9/49
a good tip is to get a backi paper fold it in half and place between pinion and spur, push pinion and spur together as much as you can, tighten and spin wheels to release paper,
and no i have never used the paper trick either, just a tip i heard at trackside,..
i also have a brain, lol... re: below
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