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August 29th, 2010, 01:26 PM
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ninjette.org member
Name: menno
Location: Holland
Join Date: Jun 2010 Motorcycle(s): Kawasaki Ninja 250r 2008, Leo Vince Oval Slip-On, custom header, Seat Cowl, Powercommander III Posts: 27
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Backfire on downshifting and decelerating
hey guys
i have a 2008 ninja fuel injected with a leo vince slip on so not a full system also i have a powercommander installed in it very often when i downshift or decelerate from about 8k revs i get alot of backfiring or popping however u want to name it. i red about removing the kleen air system removing but since i also have a powercommander i could change the fuel mapping so it runs a bit less rich in the 8k revs region any advice on which of the 2 i should do? |
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August 29th, 2010, 04:12 PM
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#2 |
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Wartown, USA
Name: Bryan
Location: Warner Robins, GA
Join Date: Nov 2009 Motorcycle(s): 2009 Ninja 250R SE, 2007 Ninja 650R, and assorted other bikes Posts: A lot.
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Check the exhaust manifold bolts, and make sure you dont have a leak or loose bracket. Recently, a buddy had the same issue, and found that one manifold bracket had loosened up.
The next thing Ive heard mentioned is to remove the kleen air setup when you run a race exhaust. Not sure how this would cause it, because Ive never really looked at the kleen air system to see how its setup. |
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August 30th, 2010, 06:15 AM
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#3 |
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ninjette.org member
Name: menno
Location: Holland
Join Date: Jun 2010 Motorcycle(s): Kawasaki Ninja 250r 2008, Leo Vince Oval Slip-On, custom header, Seat Cowl, Powercommander III Posts: 27
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i checked all the bolts and its all fine so thats not the prob
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August 30th, 2010, 06:50 AM
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#4 |
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ninjette.org certified postwhore
Name: Eric
Location: Iowa City
Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot.
Blog Entries: 54
MOTM - Sep '18, Feb '16
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You must block off the kleen air systen when using abfull exhaust. The system directs air into the exhaust just past the exhaust valve. This air will cause your O2 sensor to read funny and the air will cause the backfire problem
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August 30th, 2010, 07:00 AM
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#5 |
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ninjette.org certified postwhore
Name: Jason
Location: Jacksonville, Florida
Join Date: May 2010 Motorcycle(s): 09 Ninja 250R SE, 07 Honda CRF230F, 06 Honda CRF150F Posts: A lot.
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+1 on removing the kleen air system. It fixed all my back-firing.
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