Help needed on backfire and idle - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 3 Old 07-02-2009, 09:18 PM Thread Starter
Join Date: May 2009
Posts: 12
Help needed on backfire and idle

Hello all KLR mechanics,

A buddy of mine with a KLR is having trouble with backfires during heavy deceleration/engine braking and at idle, it is not steady when adjusted to around 1400 rpm, it misses and fluctuates +/- 200 to 300 rpm.

Anybody solved similar problems already?
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post #2 of 3 Old 07-03-2009, 03:00 PM Thread Starter
Join Date: May 2009
Posts: 12
Thanks, I'll have a look at those two items. The first one sound like a rather large concern if the engine is sucking air directly.

Someone also suggested I have a look at the timing, does anyone else think that could be the problem.
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post #3 of 3 Old 07-03-2009, 03:29 PM
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kent soignier's Avatar
Join Date: Nov 2007
Location: north Ga. USA
Posts: 272
Help needed on backfire and idle

Probably not the timing, more likey too lean an idle mixture. That goes along with the above theory of an airleak.
Check the manifold boot and clamp as suggested. if it persists;
Open up the pilot fuel screw, under the tamper proofing plug. usually two turns from lightly seated is pretty good though each one is different by nature.

'08 KLR650,
'72 BMW R75/5 (Col. Klink),
'02 KTM 400 E/XC,
'05 ktm 125 sx (for sale)

"Hey, are you okay? Can you get up?
I thought you said you could ride"

All the best
Kent Soignier
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