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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2005 YZ250 Top End Notes
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[QUOTE="bedell99, post: 988585, member: 18299"] I'll get some pics tomorrow morning. I have no clue how the bike will run till later on this week, but I already can tell the bike has more compression thru the kick starter. I really feel I went to long on this piston. The letter is stamped on the back of the cylinder towards the airboot/carb. An A cylinder is smallest and it goes up in size as the letters increase(A,B,C,D). A "B" piston is 1/100 mm larger than an A piston. You can purchase A thru D pistons from yamaha. Erik [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2005 YZ250 Top End Notes
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