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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: DeanG on August 13, 2015, 12:50:07 PM

Title: Throttle body zip ties
Post by: DeanG on August 13, 2015, 12:50:07 PM

the mechanic who worked on my K75S before I purchased it used zip ties to seal the throttle bodies. I will check for leak. If so, could this be the cause of the annoying backfire I get?

Title: Re: Throttle body zip ties
Post by: K75RT Keith on August 13, 2015, 01:34:46 PM

Check the crankcase breather tube it's Z shaped near the airbox above the FPR back towards the transmission.  Could also be a improperly adjusted TPS.  Or, that you are not closing the throttle all the way on deceleration.   

Title: Re: Throttle body zip ties
Post by: Scott_ on August 13, 2015, 09:11:19 PM

Backfire on deceleration? As I have heard/read about this on other K-bike forums, I'll just say that it is not uncommon.
I even get it on my 1100's.

Title: Re: Throttle body zip ties
Post by: DeanG on August 14, 2015, 01:11:47 AM

Thanks for the suggestions. I know that K bikes tend to backfire, but I don't want this one to. I will start testing for leaks and see if I can fix it. Stay tuned for the no doubt exciting results. The good thing about retirement is that you have time fool with stuff like this...

Title: Re: Throttle body zip ties
Post by: TimTyler on August 14, 2015, 02:38:14 AM

Check your TPS setting first.

When you drastically decelerate, make sure the throttle is 100% off otherwise you're still sending fuel to the combustion chamber which will cause backfiring.

You might need a new muffler gasket too.