who should do the trail porting?


Yeah,interested in that answer also???You could buy templets off e-bay and try your self though??
 
my friend had his done on his f-7,looked terrible,and he went over it cleaned them up and he didn't really notice any gains,so I;m not sure about doing this either.You need to know what real needs to be removed.
 
Although I have never had him do any of my own stuff, I have heard nothing but great reports on MadMax Bob's work. He knows Yamaha engines very well.
 


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