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FJR Motorcycle Forums
Technical & Mechanical Problems
Sad morning in my garage
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<blockquote data-quote="Turboduck" data-source="post: 136081" data-attributes="member: 3014"><p>Hey Wally, It's me, Bill. And hi to the rest of you guys here in FJR land. Thank you for the kind words Wally, I will try to keep it from going to my head. And in my attempt to not be proud AND to get your Yamaha happy again,,, I am asking for someone to give me some actual numbers for cylinder compression. I checked yours and they were seamingly high. And while they took longer than I like to reach their max pressure they topped out quite high at 205, 205, 205, 195. I looked and looked in the manual and only found "10.8 to 1". 200 psi is higher than 10.8 to 1. Do you remember me mentioning the old Wisconsin engine yesterday?? It too began knocking in a very similar way due to too much carbon built up in the combustion chambers. Which would also raise compression too, ya know. SO, if you or one of your FJR buddies could give me some real numbers of their engines compression, I can use those numbers to help me to know if this could be the source of our noise.</p><p></p><p>Gotta run, don't want to be late for church! I'll check in later this afternoon, Bill</p></blockquote><p></p>
[QUOTE="Turboduck, post: 136081, member: 3014"] Hey Wally, It's me, Bill. And hi to the rest of you guys here in FJR land. Thank you for the kind words Wally, I will try to keep it from going to my head. And in my attempt to not be proud AND to get your Yamaha happy again,,, I am asking for someone to give me some actual numbers for cylinder compression. I checked yours and they were seamingly high. And while they took longer than I like to reach their max pressure they topped out quite high at 205, 205, 205, 195. I looked and looked in the manual and only found "10.8 to 1". 200 psi is higher than 10.8 to 1. Do you remember me mentioning the old Wisconsin engine yesterday?? It too began knocking in a very similar way due to too much carbon built up in the combustion chambers. Which would also raise compression too, ya know. SO, if you or one of your FJR buddies could give me some real numbers of their engines compression, I can use those numbers to help me to know if this could be the source of our noise. Gotta run, don't want to be late for church! I'll check in later this afternoon, Bill [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Sad morning in my garage
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