KLX250sf D-Tracker (2011) Aftermarket exhaust systems?????HELP
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Senior Member
Joined: Aug 2011
Posts: 516
From: Phuket, Thailand
1st Gear Member
Hi;
I have purchased a FMF Q4 slip on muffler and fitting a receptacle to install the O2 sensor but the bike does no idle well and once i start to increase the throttle it stalls. Sometimes when the throttle is let off the bike backfires. Anyone that has fitted this pipe do you have to re-map the bike to make it run richer?
Help with these problems,
I have purchased a FMF Q4 slip on muffler and fitting a receptacle to install the O2 sensor but the bike does no idle well and once i start to increase the throttle it stalls. Sometimes when the throttle is let off the bike backfires. Anyone that has fitted this pipe do you have to re-map the bike to make it run richer?
Help with these problems,
Go onto ebay an order a 02 eliminator & by-pass the sensor. The eliminator will trick the ecu into running at maximum allowed richness.
Oxygen lambda o2 sensor eliminator Kawasaki KLX250S KLX 250 S/SF EFi | eBay
If you still feel the need for more richness or control over your fuel map, then order a power commander or a EJK fuel controller.
Also blocking the air feed pipe from the airbox to the PAIR valve (clean air system) will dramatically stop backfiring, just fill the tube with silicone & job done. There are specific PAIR valve block off plates available if you like but my silicone fix is still holding up after 3 years.
https://www.kawasakiforums.com/forum...ssembly-39859/
Last edited by JoelThailand; Nov 17, 2016 at 06:43 AM.
Junior Member
Joined: Dec 2013
Posts: 5
Thank you JoelThailand
JoelThailand thank you so much for the info. I have ordered 02 eliminator from e-bay so I am very interested in seeing the results. I wish I spoke to you before drilling a hole and welding on a bung on the new SS muffler!! I will block the Pair valve if the backfiring continue.
Thanks again
Deep Sea
Thanks again
Deep Sea
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