Dear racer,

Do you wash your air filter? The instruction from GQ filter advice not to wash it, but it said it can be use for one or two hour. I don't think in a normal unprepare track, the filter can last so long.

I do wash my filter but my piston suffer from severe scrach after about 4 gallon of fuel. I'm rebuiding this engine and wonder should I wash the filter in the future, please advice. Thank you.