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Yamaha MX & Off-Road Dirt Bikes
yz250f upgrades
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[QUOTE="oldguy, post: 1226359, member: 16965"] First thing is to get the valves replaced with Kibblewhite stainless steel. This will help ensure the life of the valve train for a couple seasons (as long as you do periodic clearance checks and adjustments). It wouldn't hurt to send the head off to a knowledgable engine builder such as Eric Gorr (altho there are many more in the area- I just prefer his work) to make sure everything is up to spec and maybe have him clean up the porting a bit. The cam will probably also be pretty close to it's life expectancy so you may want to consider a hot cam. Do not go cheap and leave the current timing chain in replacing it as long as the engine is apart is cheap insurance. Waterpump should also get a good looking over as long as you are inthere. Replace anything that looks at all questionable- nothing worse then putting it all together to have to tear it down a week later for something you thought would make do. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
yz250f upgrades
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