The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Crossrodes on November 13, 2009, 03:34:15 PM
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I took the R65 out to lunch today and had a problem with the bike revving up to 4000 at idle and when riding. I first noticed it when riding along and when I throttled down it would not reduce revs. I blipped the gas several times with the clutch in and sometimes it would work to reduce revs and sometimes it would not. At another point I was sitting at a light in neutral and it started to rev right up to 4000. This hap pended several times.
When riding and this happens I noticed it would sometimes reduce rpm if I had the clutch in and hit the brakes????
A couple of days ago when the bike was running fine I had a 50 km ride in the rain and I also put some Chevron Techron in the tank to clean our the fuel/combustion system.
Any thoughts?
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First thought, would be the throttle cable system is hung up .
Second would be the centrifugal advance mechanism in the 'bean can' is stuck in the advance position .
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Check the diaphragms !!! fuel additives are dodgy
Lou
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Dang but you guys are good! great advice covering all potential problem areas. Props to Bob and Lucky Lou. Monte
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Thanks guys.
I'm thinking cables or diaphragm. I changed the cam seal and cleaned up the bean can this summer. Oh well, time to put her away and maybe take her apart. I wasn't planning on doing the carbs but I guess I'll spring for a kit from Bing this winter.
The fact that it sometimes throttles down when I apply the front brake is puzzling though. I was wondering if I could have something that is obstructing the flow of gas in the tank and when I apply the brake the inertia moves the obstruction and allows the gas to flow again...just a thought. What do you think?
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There's enough fuel in the carb bowls, and the fuel lines to run the engine for a couple of minutes, so I don't think it's a fuel delivery issue .