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Everything Dirt Bike
General Dirt Bike
4 strokes valve work
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<blockquote data-quote="TurtleShifter" data-source="post: 165547" data-attributes="member: 217"><p>Since were "whipping them out" I think that Yamaha did a great job with their WR valve train. Just last May was the first time I even cracked open the head on my '07 WR450. Never even had them adjusted. Bike was still running strong, starting easily. Just decided it was time to put some YZ cams in the bike, do a little port job, a slight bump up in the piston. My motor guy, Paul at ASRacing, said the valves looked worn but said I could re-use a couple if I wanted to. Chose not to. </p><p></p><p>Been happy with the motor on this bike. Had a YFZ450 quad I took to Glamis all the time. Same thing. Motor ran strong and never did any valve work to it. It was an '04 and sold it in '08 still going strong.<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif" class="smilie" loading="lazy" alt=":thumb:" title="Thumb :thumb:" data-shortname=":thumb:" /></p></blockquote><p></p>
[QUOTE="TurtleShifter, post: 165547, member: 217"] Since were "whipping them out" I think that Yamaha did a great job with their WR valve train. Just last May was the first time I even cracked open the head on my '07 WR450. Never even had them adjusted. Bike was still running strong, starting easily. Just decided it was time to put some YZ cams in the bike, do a little port job, a slight bump up in the piston. My motor guy, Paul at ASRacing, said the valves looked worn but said I could re-use a couple if I wanted to. Chose not to. Been happy with the motor on this bike. Had a YFZ450 quad I took to Glamis all the time. Same thing. Motor ran strong and never did any valve work to it. It was an '04 and sold it in '08 still going strong.:thumb: [/QUOTE]
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Everything Dirt Bike
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4 strokes valve work
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