Re: '75 CB550K1 Gulf - Homage to Clyde
Those of you that have been following for a while may recall me having an issue with a very annoying shake at about 50mph. I've been chasing it all winter and today I think I found the biggest contributor.
After all the suspension changes, it remained, and so today I decided to check the wheel/tire balance again. They turned out to be fine, but when I installed the chain and spun the rear, my chain was *much* tighter in certain areas of rotation so I investigated that. I removed the chain, and measured the aluminum rear sprocket for roundness. It turns out it was machined nearly 1/16" out of round.
I put the chain back on, very loose, and went for a spin. The shake was drastically reduced, but still there. Now this is just a guess, but I think that when the chain was tightened by the sprocket position, it basically bound and acted like a light tap on the brakes every rotation. Sound reasonable?
I'll be calling Sprocket Specialists tomorrow and getting a replacement.
On the upside, the suspension got an overhaul because of it. Blessing in disguise I guess.
Edit: I should clarify this isn't a wobble. It's a definite shudder/shake.