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Kawasaki MX & Off-Road Dirt Bikes
2T Engine experts -> your opinions on top end rebuilds
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[QUOTE="DieselTech, post: 1223341, member: 74999"] Joe, Yes, I understand valve wear and that it "doesn't stop", but really, as long as the valves are sealing and have the correct clearance, it's not an issue (I would think). What I'm interested in is how to judge valve face wear based on shimming - you seem to address that with your times, but where do your numbers (50 hours, 40 hours, etc.) come from? Empirical data derived from hundreds of valve jobs on these 4T's? For instance, consider this: if the bike is new, and 1)the length of the valve is known (manufacturing tolerances) and 2)the width and angle of the valve seat face is known (again, manufacturing tolerances), couldn't a formula be worked out that would allow you to compute the decrease in valve seat face width based upon diminishing valve stem tip-to-shim-to-bucket-to cam lobe clearance? In a nutshell, you baseline the valves before it's run, then at every valve clearance check/adjustment, you could accurately calculate actual valve seat face wear based on the required shimming to keep the valves at thier initial adjustment (baseline). It's an interesting topic for me, at least..... I do know about the Kibblewhite components and longer life, and when his bike is ready for valves, that's most likely what I'll put in it. Yes, I do need to get Eric's book, and more actual hands-on experience with bikes too. That's why I try to do all the work on our bikes myself. I don't mind buying tools and books, as that's how I learn to do this stuff. But, it always helps to have your questions answered by more knowledgeable people. Thanks for your suggestions! [/QUOTE]
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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
2T Engine experts -> your opinions on top end rebuilds
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