Who's up for a game of "what's that sound?"

[Mitch81special]

1981 special. Anyone have any idea what that noise is? Iv checked valve clearance and cam chain adjustment.

 

[Jim]

Did you adjust the cam chain with it running?

 

[Mitch81special]

Did you adjust the cam chain with it running?

No I just turned the roter by hand.

 

[Jim]

Try warming the bike up, then adjust it at idle. Look for about 1-2mm in and out movement of the pin.

 

[Mitch81special]

Try warming the bike up, then adjust it at idle. Look for about 1-2mm in and out movement of the pin.

I'll try that, but isn't it supposed to be flush?

 

[Jim]

Yes, flush when it kicks out and 1-2mm in when it moves in. It will bounce back and forth. If it stays flush while running, it's too tight.

 

[Mitch81special]

Yes, flush when it kicks out and 1-2mm in when it moves in. It will bounce back and forth. If it stays flush while running, it's too tight.

So the less travel of the pin, the tighter the chain is?

 

[Jim]

Yes. Once you get to flush or slightly protruding, you're just stretching the chain past that point. That's why you want to see that 1-2mm movement.... to make sure you don't have too much tension on it. once that's sorted, I'd go back and recheck the valve clearances. What did you set them at?

Just noticed you're new here. Welcome to the madhouse!!

 

[Mitch81special]

Thanks for the welcome! Iv got them set at .15mm for exhaust and .06mm intake