Rough Running Midrange - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #1 of 2 Old 07-26-2011, 03:11 PM Thread Starter
Join Date: Jul 2011
Posts: 1
Rough Running Midrange

i have a 2008 with about 27k miles on it almost all of which is street use. It recently began to stumble of "hunt" in the 3500 to 4500 rpm range particularly when traveling at a constent speed on flat ground at low throttle settings. Idles great, runs flat out fine. I checked the valves and they are in spec. Seems like some kind of carburation problem. Any thoughts?
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post #2 of 2 Old 08-07-2011, 08:58 PM
Join Date: Aug 2011
Location: Ohio
Posts: 13
I'm new and I don't own a bike, but I found this in the KLR FAQ's and Helpful Links thread.

"Why is my bike running poorly?
Start with these:

Clogged pilot jet
Crud in float needle valve preventing closure (or full flow)
Torn carb diaphragm (usually midrange running problems)
Plugged carb vent hose (do the T-mod)
Plugged gas tank vent preventing creating a vacuum in tank (stalling/starvation on highway) Drain hose is full (the ones with the caps/reservoirs; drain and recap)
Vacuum line to petcock is collapsing when it gets hot, causing fuel starvation
Inline fuel filter (aftermarket) is restricting flow (the in-tank screens are usually pretty clean)
Gas boiling in fuel line (if it's very hot out, generally over 100-105 deg F, and if side shroud vents are covered)
Valve clearance at limits"

Last edited by moreair; 08-07-2011 at 11:09 PM.
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