Author Topic: Spark knock?  (Read 1720 times)

stepheva

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Spark knock?
« on: September 19, 2009, 03:22:18 AM »
Hey guys.  I've sorted out most of my other issues with the B&W150, but i'm still having one.  When accelerating, going up hills or riding 2 up, I get an annoying knocking sound from the motor.  My gut is thinking this is spark knock.  I have an NGKDP7EA9 in it right now, and I'm going to try running one plug colder and maybe upjetting.  Anyone else getting this knock on acceleration, etc?

zombie

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Re: Spark knock?
« Reply #1 on: September 21, 2009, 12:26:36 AM »
Premium fuel will help...some. Your on the right track w/ your cures. Lifting the jet needle 1 notch may also work. It's easy, and free...
"They have nothing in their whole imperial arsenal that can break the spirit of one Irishman who doesn't want to be broken."   Bobby Sands...

stepheva

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Re: Spark knock?
« Reply #2 on: September 22, 2009, 03:03:05 AM »
Actually figured it out; crank bearings. 

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