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05 yz250 rough idle - video

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Hello all, 

 

My 05 yz250 seems to be idling funny. Air filter is clean.

 

Also, this may be a stupid question but during normal operating temps, is your cylinder supposed to be extremely hot? (Like I can't touch it for more than 1 sec)

 

 

 

Edited by Andrew13

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Sounds good to me too.  Maybe a touch lean, but not much.  I have a habit of running the idle a bit rich to help coming off idle better.  

 

If you think it is too hot, get some of those stick on temperature tapes to monitor it.  Remember the water is way over 100 degrees.

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It's got worn rings, and that makes it slow on the rev as the mixture isn't being burnt completely.

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So in a nutshell it needs a new top end?

Check compression, but it sounds slow on the rev, only firing cleanly one in 3 or so, typical note and response of low compression, could be blocked exhaust, but more than likely top end time

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