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Discussion Starter #1
Hi Just changed 03 450 exc for 2010 400 exc with 50 hrs on it fitted dirt tricks camchain tensioner checked valve clearances .only thing ive noticed is bike hardly needs any choke and seems to run a bit rich .ive cleaned carb and checked all jets which are all standard .Ive heard that some carb tuning helps .can anybody offer any advise on jet and needle mods .

thanks steve301265
 

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lockwire your accelarator pump , ive put in a jd red needle a 168 main an air screw 1 3/4 turns out works a treat for me , there is a couple of threads on hear giving the cheaper needle codes
 

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Discussion Starter #5
Cheers fibulna . ive got 168 main OCEMN needle gunna put them in and see how it goes .
thanks again 4 advice.
 

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lockwire your accelarator pump , ive put in a jd red needle a 168 main an air screw 1 3/4 turns out works a treat for me , there is a couple of threads on hear giving the cheaper needle codes
Is this lock wiring of the acc pump mod something that would need doing on a 2009 450exc as well?
 
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