Now that the carb switch was complete with good results, a shakedown ride revealed another problem:

 

The drive chain is rubbing the cases enough to mar them.

 

The drive chain appears to be the correct size. I wondered if a thrust washer was missing behind the sprocket, but a schematic found on this site doesn't show one.

 

I tried to pull the counter shaft in and out to check for some obvious play, but found none.

 

I can come up with a washer of some kind without too much trouble, but I don't know if there are other issues that need addressed.

 

Thoughts?

 

 

There are different width 520 size chains depending on brand and if they are non-sealed, o ring or x ring

What size front sprocket is it?

A photo showing where it rubs might help solve your mystery

Feet up is correct. A basic 520 chain like a DID or RK would probably solve it.

 some aftermarket sprockets use a washer to space out the sprocket, the original one had a shoulder on the sprocket.

Here are some photos. Hope they show enough. The sprocket is an 11 tooth.

 

I pulled the chain and had some trouble removing it by pulling from the top side / rear. Hung up. I figured I had a kinked link but found nothing kinked. It just seems to be hanging up. I think the chain is incorrect as said above.

 

I didn't pull the sprocket as I didn't have a socket large enough. Not even sure what size to get.....

 

Dumb question, but are the threads left handed? I'm assuming counter clockwise to loosen.

The socket size is 32mm and the front sprocket nut unscrews counter clockwise as you tought. I see your ignition case rear Arm is broke. Also iv'e had the chain catching on the tab washer that locks the nut some times iv'e had to trim it down on the 11 tooth sprocket there should be a spacer (TOP HAT) behind the front sprocket.

Edited October 21, 201510 yr by bondy

That looks like you have a sprocket with no shoulder on it which means you will need a washer of some kind behind the sprocket to space it out to sit where it is supposed to sit. I have one so they are available but I don`t know who would have one though. Even a couple of lock washers behind the sprocket would work. It only needs 2 or 3 mm. Graham.

Thanks for the replies. I will get it pulled tonight, hopefully, and go about finding an appropriate washer.

 

Herman

Order a new front sprocket from inmotion no need for a washer as i said above may be the spacer is missing?????

Slapped an appropriate spacer behind the sprocket as it had none.

 

All is well now.

 

Another field test set for tomorrow.

The clutch actuating arm wont work right till you get the cover welded back up with the missing bit

Did you replace the seal behind the front sprocket? Also as above the clutch Arm won't work correctly 1 off my bikes had same problem so i had a new bit alloy welded on.

Edited October 29, 201510 yr by bondy

I only ask about the seal as the spacer as to push throw it with the top hat lip facing the bearing.

Edited October 29, 201510 yr by bondy