Super Jet 2007 SJ. Help dailing in my carb.

[20superjet07]

The mods: 2007 superjet. True dual cooling. Factory B-pipe. ADA head 35mm. MSD enhancer. Ported intake. 135 main jet. 75 pilot. 95g spring. High speed screws out 1.25 turns. Low speed out 1.5 turns.

It runs. But about 80% of the time when you hammer the throttle it doesn’t take off. It doesn’t do anything. But 20% of the time it will launch without hesitation. Also I noticed when I fall off, it seems to continue to rev for a few seconds (but it is not just a high idle). Also when you quickly let off the throttle it seems to continue to rev.

Talked to Wammer and he said I need to upgrade the OEM spark plugs to NGK B8ES. But I won’t be able to try that out till Friday. I will try the new plugs and let you know. But in the meantime I was just wondering what you guys thought. Thanks!

 

[B3IS]

Same issues with mine just dropped it off yesterday. A couple of guys think it is the manifold to motor exhaust gasket leaking water. I am not sure, sounded like and exhaust leak with the hood off but all couplers are nice and tight lined up. I WILL know whats up within the next day or two from the shop.

 

[20superjet07]

okay thanks. Mine has all brand new gaskets and sounds perfect with the hood off. But still interested in what you find out.

 

[Tyrant1919]

Pull your carbs and just clean everything you can. I'm always surprised what that'll do by itself.

 

[20superjet07]

Wamilton was right. Just switch the plugs and it ran fine! I do have some oil running out of the exhaust after riding. Should i adjust my hi and low speed screws any? Or just leave it alone? Currently: High- are out 1.25 turns and Low- out 1.5 turns. thanks