Scram jet sidewinder

[blackbelt5]

I have scram jet sidewinder boat it has a 650 Kawasaki in it. Does any one know any up grades that i can do to increase performance? Thanks

 

[Scott Danforth]

if its stock, you can rebore, velocity stacks, exhaust mods, carbs, etc. plenty of engine kits out there

do a bunch of reading on greenhulk.net

http://www.groupk.com/k650.htm

However selling and getting a bigger PWC is many times the lower cost alternative