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Post by Fox on Jul 31, 2015 11:54:48 GMT -5
Is the engine in your CPI a stock 50cc or has it been upgraded?
Were you running a stock air filter at the time of the failure or was it modified or changed to a "performance" filter?
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Post by niz76 on Jul 31, 2015 21:06:07 GMT -5
This is a 70cc, not a stock motor. But man, holy crap. Didn't you notice 'something' just before it blew? The engine must've been telling you something because this doesn't just happen. So: Lean jetting? Too warm heat range plug? Ignition wayyy off? Bad gas (low octane number)? Air leaks? Btw, have you been using a piston stop? Are you asking this about the pic I posted? I don't wanna hijack this thread (sorry!) so I'll just leave the link and you can read all about it lol. Btw- this was a 50mm 90cc piston... 49ccscoot.proboards.com/thread/9791/scooter-diary-roketa-changing-gears?page=31
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Post by Lucass2T on Aug 1, 2015 1:33:06 GMT -5
This is a 70cc, not a stock motor. But man, holy crap. Didn't you notice 'something' just before it blew? The engine must've been telling you something because this doesn't just happen. So: Lean jetting? Too warm heat range plug? Ignition wayyy off? Bad gas (low octane number)? Air leaks? Btw, have you been using a piston stop? Are you asking this about the pic I posted? I don't wanna hijack this thread (sorry!) so I'll just leave the link and you can read all about it lol. Btw- this was a 50mm 90cc piston... 49ccscoot.proboards.com/thread/9791/scooter-diary-roketa-changing-gears?page=31Oh! My bad. I just replied on the info provided in this praticular thread. Didn't read the build thread.
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