[Walt Fricke]

I once made the mistake of holding the velocity stacks on with machine screws. Sure enough, some got loose, and fell into the throats. Only one of the three affected pistons was a writeoff, but not pretty or helpful. I could hear something was wrong as my wife drove the last couple of laps of an enduro.

Do you actually have those screen covers? I've never had any. Instead, I have put a piece of open cell foam into the recess they cover, which is then under the aftermarket air filter base (which has holes in the right places). Seems to do the trick of keeping sand grains and the like out of the innards. But the stock pieces would probably be better.