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01-09-2017, 05:29 PM | #1 |
Join Date: Jan 2017
Location: Newcastle Australia
Posts: 3
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83cc BBK A9 cam problem
Hi everyone,
I'm new to this group all the way from Australia, I have an issue I hope someone can shed some light on. I have just fitted a 83 cc BBK and big valve head to QMA139 scooter. When fitting the A9 cam I struck a problem with the inlet valve hitting the Piston once the valve lash was set when trying to wind over by hand. I was confident valve timing was correct, I have put standard cam back in with no problems. Has anyone encounter this problem before? The engine runs well but has very minimal power increase, I would think using the standard cam is to blame. Thanks UU4444 |
Tags |
a9 cam 83 bbk |
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