SX/SXi/SXi Pro Bottom end hesitation.

[Craig A]

My brother in law has a 96 SXI, he added the factory pipe wet pipe (I dont know the model #), and a K&N. He put the bottom end jets in that came with the pipe, and were recomended. Ever since, the ski has a real bad hesitation on the bottom end. He is pretty mechanincly inclined, but this has got him stumped. Any ideas, or is it time to take it to a shop??

 

[MADMAT]

I have had this a couple of times and for me it was jetting. The jets they sent may not be correct.

 

[D-Roc]

could be to high of pop-off as well. hesitations are a lean mixture problem.

 

[keefer]

I have always heard that the SXi needed a lower pop off pressure along with richer jetting to get rid of the lean condition in the low end. Drop the pop and see what happens.

 

[Craig A]

Sounds good...ill tell him to give that a try..

 

[upstand2]

Funny I leaned my lowspeeds on my 96 to 77 I beleive. Made it crisper. I suppose it depends where you ride. I was never really satisfied with that pipe on my SXI untill I added ECWI. It's much , much better then.

 

[tor*p*do]

eat more fiber . .. . . . . take all the hesitation out of your bottom end!


:wink:

 

[Nefarious]

I have always heard that the SXi needed a lower pop off pressure along with richer jetting to get rid of the lean condition in the low end. Drop the pop and see what happens.

That's exactly what it sounds like. The stock pop-off is pretty high to compensate for the stock F/A. Drop the pop-off and take it for a ride. IIRC FPP even recommends cutting the stock spring to lower pop-off (maybe that was for the '95's)

 

[SXIPro]

For giggles, have him put the factory air box back on instead of the K&N. My SXIPro was very finicky when it came to changing the air filter. Even if I just removed the rubber silencers from the stock box, it gave it a dead spot on the bottom end.