Topic: Serious issues with cb550

[terrorshark]

Did a full rebuild on my 75 cb550.
600cc kit.
Full deal and a full tear down.
Runs great. Revs great. Went for the first ride around the block and the shifter is super tight. Shifting through gears is a challenge. Seemed much smoother before the engine went in the bike.
Came to a stop sign a block away and when I downshifted the rear wheel locked up.  I after some moving around I got it unstuck but it happened again about 50 feet later. Thought it might have been a rear brake issue but definitely not.
I can roll the bike with the clutch in.
Pulled the oil pan and of course found some metal
Shavings. No broken teeth just some small shavings. It looks like the main chain is rubbing against the case, has a lot of play and seems like it's binding up.
Any ideas on why would be appreciated.

[terrorshark]

Here is a picture of the bike.

[Bootsey]

Did you split the cases when you did the rebuild? I'm assuming you didn't replace the primary chain if it's rubbing the cases -  If the chain is rubbing the cases, it will likely need replacing.

You might also want to pop off the clutch cover, and have a look clutch assembly & shifting mechanism to see whats stopping you from shifting gear. You might want to check over the kicker mechanism as well the  - reminded me of this, but not sure that its relevant to yours.

http://forums.sohc4.net/index.php/topic,69328.msg767378.html#msg767378