RPM Hanging Around 3-4K When The Bike is Cold

Question

So I’m having a bit of an issue with the RPM hanging around 3-4K when the bike is cold. It’s a 03 250r. Once it warms up you can snap the throttle and have zero issue with the rpm’s staying high. Kind of at a loss. Once it’s hot the bike runs fine rpms come back down off a rev very nicely. How far in that temp gauge should I let it get before riding it?


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Camdan Balkon 6 years 20 Answers 2028 views 0

Answers ( 20 )

    0

    Have you tried to adjust the idle?

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      I play with the idle to get it to settle down when it’s hanging up when Cold but when it’s hot you can leave it

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    Carb probably need to be cleaned the cvks are pissy carbs

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      I literally just cleaned them 2 days ago

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      I have the same carbs on my 600 had to clean them a few times my bike did the same thing wouldn’t go to idle when cold

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      not really the end of the world for me just a pain in the butt

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      Does yours do it while on choke?

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      Also make sure boots are on all the way and tight

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      Does it on choke but if you take it off choke and rev it when it’s cold it’s hangs around 2-3500 rpm till it’s warm. Any idle adjustment stops it

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    Automatic choke?

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      No manual

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      An 03 motorcycle with a manual choke? That is odd.

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      You can go buy 2017 Motorcycles with manual chokes..

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      My 2015 is fuel injected.

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      If you’re talking about a 300 then yes they’ve been FI since they showed up in 2013. In the NA market the 250 was never FI. Plenty of carbureted bikes can still be bought today with a “manual choke”. (Could be wrong, but I don’t think there is even such a thing as an automatic choke on a motorcycle)

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    Where is the manual adjustment on the bike. I am definitely not saying that it isn’t a manual choke. I believe you. I just think that since automatic chokes have been around for over 40 years, bikes are WAY behind the times.

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      Usually a small lever near the signal lights/headlight switch on street bikes. Others, like my KLX, have it mounted right to the side of the carb.

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    I had a similar issue back when I had 09 250. I rebuilt the carb and replaced the throttle cable. The throttle cable was sticking down towards the engine side and after the engine warmed up it would loosen up. The carb was just needing a good cleaning because the previous owner did not do any good preventative maintenance on it.

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    Spray around the carb boots with something like Ether or starting fluid. If it revs up when you spray, you’ve got a leak. Try it hot and cold.

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    I’ve got an 07 that’s EFI but if it’s got carbs, could be the butterfly needs adjusting possibly some Gunk bult up can cause rough idle until warm or something sticking until it warms. Check out the choke cable, make sure it’s not closing the butterflies too much or enough, and the throttle cable where it’s connected to the carbs or EFI, make sure it moves without binding. Good luck

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