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Post by phatboy on Apr 24, 2015 15:29:11 GMT -5
I have an eton beamer, I am trying to troubleshoot bogging above 1/2 throttle and low power (tops out about 15 mph, and struggles to get there), nothing I do is making any difference so did a compression check. I held the throttle wide open and cranked for a good 10-15 sec and it peaked out at just over psi. Specs for compression ratio are 6.9:1, pretty low, so I would expect compression to be low on a compression checker, but wonder if anyone knows for sure.
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Post by ramblinman on Apr 24, 2015 20:30:26 GMT -5
i don't know anything about 2-strokes so get a 2nd opinion before you start taking things apart. psi is too low. think it's time for a rebuild...
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Post by phatboy on Apr 25, 2015 12:25:40 GMT -5
I was hoping someone knew for sure to save me time searching but after a couple hours digging I did find a service manual for Yamaha Jog finally, it says normal compression is 114 psi and service limit is 91, so it's right at the service limit. To me that says it should still run OK so low compression must not be the cause of bogging.
I do plan to put a BBK on it, but want to make it road worthy first to be sure the rest of the scoot is good before I put lots of money and effort into it
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