300/440/550 1988 650sx pipe and carb question

[tmoney12]

Hello everybody this is my first post! I have been searching through this forum, and have been unable to find answers to a couple questions. My first question is if anybody can determine what pipe this is on my ski? It is polished stainless but has no name on it. The expansion chamber is much larger then the stock pipe.

My second question is I put a cdkII 38mm carb and intake from a newer 650SX on and the jetting is set at stock 75 pilot with 5/8 turn low speed and a either 150 or 155 main with 2 turns high speed. Is this jetting close? Mods to the ski are: pipe, aftermarket waterbox (not sure what brand), shaved head, oil injection removed, crankcase vent removed, K&N flame arrester, stainless prop, scoop intake grate, and mariner ride plate.

Any help would be greatly appreciated! Thanks

-Travis

 

[tmoney12]

Anybody?

 

[Mile9c1]

Maybe it's a Kerker pipe? I'd say ride it, and see how it goes.

 

[Big Kahuna]

Either a Kerker or a PJS pipe. Not Coffmans, Westcoast or FPP.

As far as jetting, your just going to need to ride it and see.

I would set the screws at 2 turns out each and go from there, above 2 turns out you need to go to larger jets.

 

[tmoney12]

Okay, thank you!! Is it a decent enough pipe?

 

[Big Kahuna]

yes, you should be fine.

 

[-XXX-]

Mariner?

 

[Melmack]

That should be a nice pipe juging by the sise. No idea what it is though. Make sure that carb is not a 28mm. Dont waste your time on that tiny carb. Pick up a 44 for a stock 750 or 701 and jetting should be close for a modded 650. Good luck. Fun ski!