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My bikes rpm automatically raises to 2000 rpm while standstill. It raises comes down again raises.? |
I have a 150 CC bike, 4 months old and done 4100 kms. Two free services have been done. Recently I have observed that while standing at signal lights in neutral gear the rpm automatically rises to 2000 rpm mark, comes down & again raises. This happens despite the throttle is fully released. What could be the problem. This must be having an effect on my bike's economy. As the first answer states,I also would bet it is an air leak. Check vac.lines ,carb. and intake seals. It is unlikely that it is a mis-adjustment as this would not change while the bike is in use.An air leak will change ,based on the temp. of the motor and the rate of vac. produced by the motor at different RPM's. Source(s): Many years, many bikes,lots of wrenching. sounds like you have a vacuum leak or your carb is out of adjustment. Economy not to mention dangerous to yourself and possibly others. It's only 4 mths old so take it to where you bought it as there should be warranty on it since you bought it new. Good Luck to you and be careful. Try adjusting the throttle screw at the base of the fuel tank and gently set the idle speed to the one mentioned in the bikes manual. Might require a little bit of trial and error. If that dosen't work take the bike to the dealer.Being a 4 month old bike its still covered by the warranty and is under the free service period. The mechanics there will solve the problem. Also since its a relatively new bike I would suggest that you do not tinker with it too much.It might affect the warranty of the bike.(see owners manual) two stroke or four? if its a two stroke, sounds like a bad reed valve. four, a carburation problem, maybe even just bad gas. could be a bad mixture of oil and gas in it if it is two stroke. empty the tank completely, letting it run until even the fuel lines are empty. then put fresh, properly mixed gas in it. it will be the cheapest thing to check. other than that, i don't know. could just need some tweaking on the adjustments. check the cheap things first, as always. Check wether the choke lever is kept open......? |
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