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#272266 08/28/09 4:46 am
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While taking pictures of my mk3, it fell over on it's right side, fortunately on the lawn. Since then it will not idle or run at low speed. Changed coils and spark plugs, but tend to think the Mikuni is screwed up. What do u think? Thanks Rdk

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RDKMK3 #272274 08/28/09 11:16 am
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Well, tipping over can't affect spark plugs or coils unless they specifically struck something hard and broke when it fell over. Has to be a carb issue. Sounds like a carb float/ needle and seat problem though tipping over shouldn't really damage that. Could also be that the idle speed setting was changed to be too low or the mixture screw changed somehow. In any case, you can be sure it's a carb-related issue.

Normally all that happens is that the cylinder gets a lot of fuel because when the bike falls over, the floats lift the needles off the seat and fuel from the float bowl dumps into the cyl. This can make the bike very hard to start unless you pull the plugs, spin the engine a few times to clear out the excess fuel, clean the plugs and reinstall. But you are saying that it runs, just won't idle/low speed. So it appears that some "setting" in the carb was altered by the incident...

MexicoMike #272283 08/28/09 12:25 pm
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Since it fell over on its right side the throttle probably hit the ground first. Maybe something in the slide\cable department?

MexicoMike #272310 08/28/09 2:19 pm
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I forgot to add that it would only run on one cylinder but that was due to faulty spark plug, ironic that it happened immediately after tip over.

RDKMK3 #272539 08/30/09 3:45 pm
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Not so ironic if the impact caused the carb to flood and foul one of the plugs. I would drop the bowl on that Mik and check float-needle-seat.


Dave from CT

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