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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Yamaha Powervavle Pictures
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[QUOTE="steve.emma, post: 1192917, member: 36039"] lol, no this is a steel bore. you can see the thick sleeve where the ports come through to the cylinder, you can see where the alloy barrell meets the steel sleeve. this is great on these bikes because if you seize or scratch the bore you can just have the cylinder bored out to the next oversize and buy a wiseco piston to suit. the factory sleeves are very thick and can be bored out many times with no problems AS LONG AS YOU CHECK THE POWERVALVE CLEARANCE. yes you could but if the tab is very worn then you could also have someone build up the powervlave tab by tig welding it and then filling it to the correct size. sorry mate i dont see any picture. but on the yz250 its a small round plate about 50mm diameter with 2 bolts holding it to the cylinder on the l/h side. dont know why yours would have blown apart like that, sounds like your bike is possessed!! :yikes: [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Yamaha Powervavle Pictures
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