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Everything Dirt Bike
Make / Model Specific
Yamaha
1993 Yamaha WR500 Top End Inspection
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<blockquote data-quote="Mihylo33" data-source="post: 183983" data-attributes="member: 408"><p>Unfortunately I can not find my notes and other wrist pins. The bearing looks great and unstressed. The wrist pin really concerns me and is causing me to loose sleep. It isn't sitting right in front of me but for $100+ I would freshen up that topend and wrist pin. It's cheap insurance and you can do another inspection in 60hrs. If the wrist pin looks the same in 60 hrs have a look at the rod for twisting. I think the older 490's had that issue back in the day. Your jetting appears to be right on for what you are doing maybe even slightly lean. That carbon is normal for that oil and makes me happy. No lean marks on the bottom of the dome. </p><p><img src="https://www.dirtbikeaddicts.com/static/images/smilies/cheers.gif" class="smilie" loading="lazy" alt=":cheers:" title="Cheers :cheers:" data-shortname=":cheers:" /></p></blockquote><p></p>
[QUOTE="Mihylo33, post: 183983, member: 408"] Unfortunately I can not find my notes and other wrist pins. The bearing looks great and unstressed. The wrist pin really concerns me and is causing me to loose sleep. It isn't sitting right in front of me but for $100+ I would freshen up that topend and wrist pin. It's cheap insurance and you can do another inspection in 60hrs. If the wrist pin looks the same in 60 hrs have a look at the rod for twisting. I think the older 490's had that issue back in the day. Your jetting appears to be right on for what you are doing maybe even slightly lean. That carbon is normal for that oil and makes me happy. No lean marks on the bottom of the dome. :cheers: [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
1993 Yamaha WR500 Top End Inspection
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