Port & Polish

Yamaha Raptor 350 & Warrior Forum

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You can get it done at any motorsports performance shop and on the average will cost about $300.00 for a true full race P&P. But however dont forget the cost may be more if you dont take the head off yourself and put it back together...
my local shop is going to do a valve job p&p and bore my cylinder for $150. they specialize in 1 cylinder 4 stroke engines.