Coffman's Exhaust?

[scooter jet]

I've got a worn out '91 650 with a Coffmans exhaust (manifold, head pipe, and chamber). The hull is junk so I'm parting out the motor, pump, etc. Anywho, I picked up a '91 SJ with a 701 61x in great shape that I'm wondering if I can put the Coffmans exhaust on it.

Anyone done this? Looking for jetting and prop recommendations if so.

I'm in Michigan at sea level.

 

[Bobert540]

yes it has been done plenty of times. You just have to port the exhaust manifold to match the 701 ports. Pretty simple to do. If you do a search I am sure you can find examples of templates that people have used. I know most just use the exhaust gasket.

 

[suva]

Yep, it's not very hard, but in retrospect I would have sold the coffman's and bought a different pipe, they go for a lot on ebay.

 

[luciano]

hi i have 1998,701 superjet and i bought an exhaust coffmans light serious and i cant do the waterlines, there is 2 on the monifold and 4 on the pipe, can you help please.

 

[Sospikey]

Prego!
http://www.coffmansexhaust.com/superjetin.htm