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General Category >> Rubber Side Down! >> noisy decel at highway speeds
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Message started by drums1 on 08/24/09 at 09:11:07

Title: noisy decel at highway speeds
Post by drums1 on 08/24/09 at 09:11:07

When I let off throttle at highway speeds, it pops, gurgles, almost sounds like it's running in reverse. Like a semi truck using jake brakes. My mixture screw is froze up at 1 1/2 turns out and there is a minor exhaust leak, but those things have been that way for over 1 year. My new problem has just popped up in the last month or so. With last years head replacement fiasco, I also had the timing chain tension adjuster thing replaced with the new upgraded version. Only 14,000 miles on bike. I just changed oil and spark plug. Also, bike has lot's of vibration. (see other post) I thought maybe the timing was off, but it seems to run ok other than the vibration and the jake brake noise on decel. Any idea's??

Title: Re: noisy decel at highway speeds
Post by dasch on 08/24/09 at 10:31:47

I love my jake brake noise! Or an air compressor noise. Seriously now, it's supposed to sound like that, a 650cc single, what else? Or I'm missing something.

Title: Re: noisy decel at highway speeds
Post by Serowbot on 08/24/09 at 10:40:07

Sounds like your minor exhaust leak got a bit bigger...

Title: Re: noisy decel at highway speeds
Post by BurnPgh on 08/24/09 at 10:44:31

Ineclipse has a gutted jardine muffler on his and he's louder than semis using thier jake brake. Its pretty amazing. If we're passing a semi he'll chop the throttle back for a second once we get up to the cab and the truck slows down every time. The sound is hilariously terribly loud. I imagine the driver thinks something just broke until he sees us speed past.

Title: Re: noisy decel at highway speeds
Post by verslagen1 on 08/24/09 at 11:48:37

You can't get rid of all the gurgling and popping (why would you?) but if you increase your idle speed it will help.

Title: Re: noisy decel at highway speeds
Post by dasch on 08/24/09 at 12:19:28

Mine confuses road crews with pickhammers, hehehe. Roll off the throttle and they start looking at the compressor, confused. Who the hell started this now??? +1 on the idle speed.

Title: Re: noisy decel at highway speeds
Post by drums1 on 08/24/09 at 15:44:06

OK apparently that's normal so I'll quit worrying about that and concentrate more on the vibration. Thanks guys.