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Old 12-30-2012, 07:02 PM   #3
Big Bike, Slow Rider
Joined: Jun 2008
Location: Frankston, Australia
Oddometer: 852
Do you hear the auto decomp kick in at low revs when the bike is running?

I am having the same behaviour on my 640 and my cam was replaced only 6000kms ago (as a result of the infamous cam roller bearing failure) and the auto-decomp has stopped working.

So I wouldn't discount the auto comp not working just for low mileage.

But, I would (and will) look at the other things Gunner suggested.

2005 KTM 640A
2008 Wee-Strom
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