oujawdoc

Gary,

Do you know why Yamaha ran a smaller diameter drive shaft on the 90 model superjets? It is 15mm in diameter instead of 18mm; of course it is the same at the pump and at the splines where it meets up to the midshaft. Is there an advantage to a smaller diameter drive line??

Thanks

Group K

All the early 650 models used the small shafts, but the waverunner 3s had a problem bending the subshaft in the engine compartment. When Yamaha went to the larger sub-shafts for the waverunner 3s to deal with the bending issue, all the other models shafts were also increased in diameter. I don't really see any advantage to the either shaft in the SJ application... the weight difference would be small.

Respectfully, Harry Klemm

__________________
Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987.

www.groupk.com

Water Worx

Thanks.....Gary. LOL

oujawdoc

Thanks Gary.