GS 550 / 650 chain and sprockets dimensions experience....

[Guest]

Hi for all

I'm starting to re-assembly a gs 550 with on this a swap gs 550 / 650 (673cc) engine. That engine, if I did corretly the job, will be around 72 / 80 hp, with the gs 550 transmission. I'm now ready to order a new chain with the sprockets, and I was asking myself if it would not be too short.... I do not want a screamer on the highway, but I do not want either to get a too long final transmission to break the power of the bike..

So, for those who ever did a similar swap, could you make me some feedback about your experience, sizes of the sprockets....
Note that I'll keep the gs 550 swingarm and the 19" and 18" gs 550 wheels.....

thanks a lot!

[tkent02]

I'm going to use the stock 550 stuff at first, just to get an idea what kind of ratio I want. My sprockets are wearing, but I can take them a little farther to find out. I'm thinking I'd like about the same in ratio 6th as the 650G has in fifth, maybe a hair taller but I want to try it out first.

You still have the old 550 sprockets and chain?

[boris.h]

Yes I still have them but I have to change the chain, which is not in a very good state now. I think I'll try to keep first the rear sprocket, and adjust the the last gear using the front sprocket

[tkent02]

Mine are worn too, but not completely shot. I should be able to figure out what I want to change in an hour or so. Can't wait.