jetting advice. its runinng lean

seanmurphy26

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Joined
Oct 31, 2004
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milo maine
here it is. 99 600 sx with hauck howlers. shifts out at approx. 9000 rpm.

jetting as of now

143.8 cylinders 2 + 3
145 cylinder 1 (clutch side)

pilots are 45 all the way across

fuel screws at 2 1/4 all the way across. air is at stock setting.

here are some pics. give me advice.
 

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Last edited:
How old are those plugs? New plugs with less than 100 miles on them tend to look lean because they don't have time to collect colour yet. If you have put on a significant amount of miles with those plugs I would say jet bigger... but your jetting specs seem VERY safe. As a matter of fact... with Aaen's i'm running about 5 steps lower than you. If you can't tell with the plugs... it's a lot easier to tell by pistons. If you can get pictures there it would help a lot too.

It is a 600 correct?
 
yes 600. brand new plugs. i put them in after sled was warm. held it wide open for a mile hit the kill switch and pulled them out. thats what they look like. center is white white. pto looks on but still lean. same with cylinder 3
 
what do i ahve to do to check pistons? pop head and deal with the anti freeze leaking? what to put it back together just throw the bolts on at right torque?
 
Get yourself a bore light. Put it in the cyclinder with the piston at the bottom and exam the piston. Alot less messy and much easier. And yes it is very hard to read new plugs.
 


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