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FJR Motorcycle Forums
Technical & Mechanical Problems
I just bought a ticker....I think
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<blockquote data-quote="apratt" data-source="post: 746719" data-attributes="member: 787"><p>I don't think it works that way. Can you just put a GenII head on a GenI engine?</p><p></p><p>The standard repair is to order the proper (new) exhaust valve guide seals and all the other necessary parts, and remove and replace the valve guides and seals and all in the existing head. That's how my second repair was done, and virtually all others. It's a machine-shop job: you have to bake the head to get the new valve guides in. When they swapped out my whole head the first time, it was so they could study it, not because that was the only way to fix it.</p><p></p><p>Alternatively, maybe you could find a GenI head that already has the new seals, like from a crashed bike whose engine wasn't damaged. Find out from Yamaha what serial numbers (or engine numbers) were manufactured with the new seals, or ask the owner (or Yamaha) about past ticker repair on that engine.</p><p></p><p>Then again, only a small percentage of GenI heads tick. It's never been clear what factor distinguished tickers from non-tickers: manufacturing variation or riding style or what. Maybe you could get ANY head from a crashed GenI and swap it in, and at worst you'll be rolling the dice again on developing a ticker. The more miles on the head without having ticked, the less likely it seems to be that it will develop the problem.</p></blockquote><p></p>
[QUOTE="apratt, post: 746719, member: 787"] I don't think it works that way. Can you just put a GenII head on a GenI engine? The standard repair is to order the proper (new) exhaust valve guide seals and all the other necessary parts, and remove and replace the valve guides and seals and all in the existing head. That's how my second repair was done, and virtually all others. It's a machine-shop job: you have to bake the head to get the new valve guides in. When they swapped out my whole head the first time, it was so they could study it, not because that was the only way to fix it. Alternatively, maybe you could find a GenI head that already has the new seals, like from a crashed bike whose engine wasn't damaged. Find out from Yamaha what serial numbers (or engine numbers) were manufactured with the new seals, or ask the owner (or Yamaha) about past ticker repair on that engine. Then again, only a small percentage of GenI heads tick. It's never been clear what factor distinguished tickers from non-tickers: manufacturing variation or riding style or what. Maybe you could get ANY head from a crashed GenI and swap it in, and at worst you'll be rolling the dice again on developing a ticker. The more miles on the head without having ticked, the less likely it seems to be that it will develop the problem. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
I just bought a ticker....I think
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