2 different looking primary chains?

68Cb77 · Post by **68Cb77** » Thu Dec 15, 2011 3:30 pm

I bought another primary chain a couple of years back. It looks very different from the one on it now, however, looking at other posts, my current running chains looks like the odd one. The one on it now seems quite wide, as in, you move it sideways on the sprockets a quite a large distance. It also seems like a much lighter weight chain. Guess I'll swap them out. There's a bit of light rust on the new chain, but I think (hope) its fairly ok. Here's the 2 different chains. Anybody else run across this? Thanks, John.

48lesco · Post by **48lesco** » Thu Dec 15, 2011 5:37 pm

Out of the half-dozen that I've seen in real life, and a lot in ebay pictures, I've never seen one like the one that's installed... It does look flaky. The part number did change somewhere along the line but I don't think the change was that drastic. I'm sure someone else will chime in here, but I would use the one that you bought. And if it's new, it will be a tight fit going on, especially if your sprocket and splines aren't too worn - but it will go on. -48

68Cb77 · Post by **68Cb77** » Thu Dec 15, 2011 9:02 pm

thanks 48, I guess I have to pull all the sprockets off to get that new chain on, right? What ever that takes.

68Cb77 · Post by **68Cb77** » Thu Dec 15, 2011 9:03 pm

And yes, that old chain looks totally flakey to me too. Looks like it came off some toy!

48lesco · Post by **48lesco** » Fri Dec 16, 2011 9:20 am

Its not that hard to get them off. Use a hammer and dull chisel on the crank nut (regular threads). Just a snap ring on the clutch. Pay attention to the assembly order and orientation of the sprockets and washers etc. on the crankshaft. Put the clutch, chain, and crank sprocket back on all at once and be sure to bend a tab over the nut to lock it in.

Anybody out there seen a primary chain like that?

68Cb77 · Post by **68Cb77** » Fri Dec 16, 2011 9:55 am

Thanks

Snakeoil · Post by **Snakeoil** » Fri Dec 16, 2011 2:29 pm

That installed chain looks like something off an industrial conveyor or similar. My guess is somebody happened to have access to chain of the correct pitch and made a replacement from it. Hard to believe that chain can handle the load.

regards,
Rob