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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Marc Gibaud, Clouds on Tres Cerros and Mount Fitzroy, Argentinian Patagonia

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Photo by Marc Gibaud,
Clouds on Tres Cerros and
Mount Fitzroy, Argentinian Patagonia



 
 
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Old 26 Jul 2020
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Join Date: May 2020
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I’m definitely changing the hg tomorrow actually I just didn’t want it to go bad again. I’ll see if once I change the hg it keeps doing the knock. I’ll get a vid of it. I saw the post you mentioned and it’s not that. The knock is so strange. At first I thought it was the front fender rubbing against the tire, then I thought it was the butterfly o the carb flapping away because it would go over 180 degrees at wot. That wasn’t it either. I’m honestly stumped. We’ll see tomorrow if it keeps making the noise.


Little update
Took off the cylinder head to change hg and found 2 bolts had helicoils but they were stripped. Put new ones in new head gasket in torqued down to 20 ft lbs and low and behold same issue. It’s leaking the compression through right side hg. It’s tons better than before and i don’t think it’s leaking oil yet...

I made sure to clean the mating surfaces well but looks like I will have to resurface them as it looks to have had some warpage on the right side. Hopefully it will hold up a bit longer until I can do everything properly with time but I need the bike running as it’s my only means on transport.

Anywho this thing runs no matter what. I love the old reliable steel steed. Here are some pics.
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Last edited by RealSpaceCowboy; 28 Jul 2020 at 01:05.
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