81-550T, compression & rings

[Buffalo Bill]

Oop! Got off the deep end!

Back to reality, I got a very pretty bike in the garage that could use a little freshening up to bring back the power it had when new. And not much buck$. Just replacing the rings and lapping the valves will about do me. Bigger pistons sounds fab!
I have considerable respect for the Suzuki engineers. An over bore kit engineered for the 550 engine would be more reliable than a basement experiment.
Still, Great work Nerobro and Skreemer! I'd like to read an update on your project bike's long term results.

[tkent02]

Back to reality, I got a very pretty bike in the garage that could use a little freshening up to bring back the power it had when new.

If it is down on power, look somewhere else. Your compression numbers are not that low.
These are not high compression engines.

[Buffalo Bill]

The 650's nice…

Well whether or not it fits, you lose the advantage of having a six speed, alas, the 650 has only five.
I can send pics of my 650E if it will help you see if it fits.

I just saw a nice blue 650EZ on ebay. I think it only weighs 20lb. more than the 550, but has a good 20 HP more.
Not ready to buy one yet, but I wish I'd have known more about them last year.

[duaneage]

Bill,

If you want a pictorial on rebuilding a 550T, this is it

http://www.thegsresources.com/_forum/showthread.php?t=82482