Question about BMW Motorcycles
I am in Vietnam with no authorized mechanics to help with a problem I am having with a 2002 BMW R1200c. When I got the bike it wouldn't start at all. After jumping the coding plug I got the bike to start but left side cylinder misfires. I have tried switching injectors and wiring, switched ignition, checked and cleaned intake manifold, and checked camshaft timing. Any ideas?
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Engine feels like it misfiring
BMW Airhead motorcycle ignition
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Posted on Jan 05, 2016
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Posted on Jan 02, 2017
Does that model have one coil or 2? If it checks out fine on both sides, I would assume you have a carb issue. Not getting enough gas to that one cylinder. If the ignitor was bad, you wouldn't have fire to either coil.
Posted on Jun 05, 2009
Guys ...this problem is caused by a faulty Bosch ignition coil (gray type). Replace both the Ignition control unit which is linked to this type of ignition coil (buy Transpo BM 300 - cheapest pattern type) & the ignition coil itself with a newer type 1990's model (red outlet points to spark leads.) & the problem will disappear. This is a known problem caused by hairline cracks in the gray casing. These cracks cause intermittent electrical disconnects when hot/wet - MICHAEL - DUBLIN - IRELAND
Posted on Aug 22, 2009
I have a 1980 CB750-F Super Sport and I went through this problem once.
After that long time, as MATHEW said, some gunk (gorilla snot) could be formed into the little carburetor's passages.
It will not come out if You don't "soak" the DISSASSEMBLED carburetors (without rubber parts) into carb cleaner for at least 6-8 hours.
After that, You can wash them with thinner, and then go on with compressed air.You'll be surprised with the amount of gunk that remained into the carburetor's bodies!!!
Posted on Dec 02, 2009
Wow, my 2002 blast is doing the same thing, or at least it was untill it blew a hole through the exhaust and quit running all together. Time for a sportster.
Posted on Sep 05, 2010
hey i have a ttr250 2000 model i had a very similar problem, it was misfiring and dropping out at high revs. i striped the carb cleaned everything out adjusted jet pins, oils, air/ fuel screw changed the spark plug nothing worked. in the end i got a can of carbi cleaner and sprayed it while the engine was running into the intake after alot of smoke coming out the exhaust. hey presto suddenly my bike works and revs fine. with a little bit of tuning good as new. so might be worth a try. I think it was from over oiling the air filter and the oil messing with the valves. hope this helps
Posted on Jun 10, 2011
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