Topic: New Engine/Chain Noise---solved!

[bowhunter]

Ever since I got this bike (77 750K7) ,it's had an intermittent noise coming from the tranny area, but only when rmoving. Checked all the usual culprits, clutch, chain etc., couldn't see anything. Because it was intermittent, I wasn't real concerned.
    Yesterday, I adjusted the shocks to the max setting, and went on some errands. The noise was back , in spades!. So this morning I put it up on a motorcycle stand and found the culprit. I normally use the center stand when at home,which is why I didn't find it before. Up on the motorcycle stand, with the  center stand retracted, the bottom of the stand was rubbing the chain! From the looks of things, it's been that way for a long time, with a nice groove worn in it from the chain plates. I'm making a short stop bracket that will mount to small plate that's welded on the bottom of my exhaust (4 into 2).
     Something else to look for when hunting for mysterious noise sources. Hope it helps someone.

Bowhunter

[Lumbee]

...sounds like your chain is WAY loose if its rubbing the center stand...

[Einyodeler]

If the chain has worn grooves into the stand then it`s definitely time for a new chain because the plates and pins have been subjected to a lot of stress.

[bowhunter]

...sounds like your chain is WAY loose if its rubbing the center stand...

Chain is adjusted per the Clymer's manual .  Approximately 1/2 "  movement with both wheels on the ground and most of my weight on it. The chain and sprockets are getting replaced after the riding season in a month or so. I think, that the stock exhaust acted as the stop for the center stand.I don't have access to a 750 that has a stock exhaust to verify that though. I don't see anyplace else that would act as a stop. On the other side, the foot of the center stand hits against the brake restraining rod a little. That's probably why the sound was only intermittent.

Bwhunter

[seaweb11]

(You said) " I think, that the stock exhaust acted as the stop for the center stand.I don't have access to a 750 that has a stock exhaust to verify that though."

When I replaced my very rusted out stock 750 exhaust and replaced with a 4-2 Mac, I had to make an S bracket that was bolted on to the plate you are refering to.