Breaking-up
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Road Master
Joined: Dec 2007
Posts: 1,018
Likes: 1
From: cd. Obregon, Sonora, mx
Breaking-up
Hey everyone, I need some help. A friend bought a 2010 XR1200 with 1850 miles on the clock. The bike runs fine accelerating through the gears, but breaks up between 2000 to 3000 rpms when holding a steady speed. Below and above these rpms there are no issues. The only changes he made to the bike was putting D&D 2 to 1 pipes and muffler on the bike. Anyone else here ever have this problem, and how do I fix it?
Stellar HDF Member
Joined: Aug 2009
Posts: 3,212
Likes: 212
Did he use a fuel tuner? Sounds like a fuel delivery problem in those ranges, and if he put new pipes on it could have affected that. The XR's are more sensitive than the standard XL's when it comes to tuning.
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Road Master
Joined: Dec 2007
Posts: 1,018
Likes: 1
From: cd. Obregon, Sonora, mx
He has a PCIII for the bike ,but we haven't installed it yet. I wanted to work out this problem first. By the way, the bike didn't have this problem with the stock pipes. I replaced the exhaust gaskets when I changed out the pipes.
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Road Master
Joined: Dec 2007
Posts: 1,018
Likes: 1
From: cd. Obregon, Sonora, mx
He has a high flow air cleaner coming this weekend.
Club Member
Joined: Feb 2007
Posts: 16,320
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From: Boynton Beach, FloriDuh
Working on the problem now would likely be a waste of time. The pipes have probably caused a lean mixture condition and the PCIII will correct that, but there's no point in messing with the tuner until the new A/C is installed.
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Road Master
Joined: Dec 2007
Posts: 1,018
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From: cd. Obregon, Sonora, mx
It feels like the injectors are pulsing (for lack of a better word), and not an even flow of gas. The strange thing is it only happens between 2000 to 3000 rpms, with the speed held constant.
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Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
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From: Nevada
Not strange at all. That's where you likely get a lean stumble. It's also in the range the narrow band sensors control. Get the PC on!
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Apr 28, 2006 04:27 PM