dont know on the fuel filter, only had it for a year.
its a timing belt.
it doesnt really matter if I get on it or just try to move forward by feathering the gas it still stutters... I can spin 5k rpm no problem so I wouldnt think its the fuel filter.
My clamps on the air tube were slightly loose, I thought to myself OH YEAH thats the problem, so simple. tightened them up... still no go literally