Sbn 44 jetting on a js550

[Lake St. Clair Rider]

I have recently picked up a Sbn for my 1986 js550. Before installing it I plan on rebuilding it and installing the correct jets/spring. My question is what should my high/low jets and spring be? Only engine modification is a kerker pipe. Any help will be greatly appreciated. Thanks, Zach.

 

[rhugo21]

Post on 550 facebook page. Not a lot of vintage guys around here

 

[Rennat]

I'm gonna start off with a 120 high 100 low and about 20ish psi of pop off for my buddies and go from there. Every ski is different so get familiar with the carb and how to make proper adjustments.

 

[dose]

I'm gonna start off with a 120 high 100 low and about 20ish psi of pop off for my buddies and go from there. Every ski is different so get familiar with the carb and how to make proper adjustments.

That is a good place to start
I think that's what I was using

 

[Lake St. Clair Rider]

I'm gonna start off with a 120 high 100 low and about 20ish psi of pop off for my buddies and go from there. Every ski is different so get familiar with the carb and how to make proper adjustments.

Does your buddies ski have any aftermarket parts or is it stock?

 

[Rennat]

Head, exhaust manifold, exhaust, and then the sbn 44.

 

[Nottjbarlow]

At sea level in south Florida I run a 115 low 130 high on my tastefully modded PP 550 ...... been running strong for like a year now.