Topic: 520 CHAIN CONVERSION

[JASONA317]

 I HAVE JUST PURCHASED A 73 CB 500 FOUR AND AM NEW TO THE FORUM HAS ANYBODY TRIED TO CONVERT A CB 500 OVER TO A 520 CHAIN SIZE?   

[bwaller]

Yes, I switched to a 520 o-ring chain. Bought an anodized aluminum rear from Sprocket Specialists and machined a new front to fit.

[JASONA317]

 DID SPROCKET SPECIALIST HAVE THAT OR DID THEY MAKE IT UP FOR YOU AND WHAT FRONT DID YOU USE?   

[MRieck]

DID SPROCKET SPECIALIST HAVE THAT OR DID THEY MAKE IT UP FOR YOU AND WHAT FRONT DID YOU USE?   

They will make both sprockets for you.

[JASONA317]

THANKS FOR THE INFO I WILL GIVE THEM A CALL

[paulages]

THANKS FOR THE INFO I WILL GIVE THEM A CALL

GOOD LUCK AND turn off the caps lock. 

[paulages]

to wake up an old thread here, has anyone besides bwaller made this conversion? i ask specifically because the front is what i'm concerned about, and brent's wasn't from sprocket specialists.

my SS front has no retaining holes, and came only with a clip that replaces the stock retaining plate. there is no spacer for either side, which would allow the sprocket to float on the shaft. i talked to the guy that makes all of their sprockets (randy at advanced precisions) and he says he's seen thousands if not a million of them go out like that, and has never heard of one hitting a case. he says the chain itself will keep in in alignment. i can't help but feel a little nervous about this.

has anyone run one like this? should i machine spacers to locate it and secure it properly?

[TomC]

Hi Paulages
     I am currently running a 520 X-ring chain on my CB400F1. I am just using the C-clip with the front sprocket. I looked in there to check and saw no problem.
     When I do this with my 550 I will keep an eye on were the front sprocket is running. I am thinking that rear wheel alinement will control were the front sprocket runs. Also on my CB400F1 the rear sprocket goes on one way. The cut to reduce the width for the 520 chain was made on the outside. If the CB550 rear sprocket only mounts one way I would have the cut made on the inside of the rear sprocket. That way the centerline of the chain would be moved out away from the engine case.
          TomC in Ohio

[paulages]

Hi Paulages
     I am currently running a 520 X-ring chain on my CB400F1. I am just using the C-clip with the front sprocket. I looked in there to check and saw no problem.
     When I do this with my 550 I will keep an eye on were the front sprocket is running. I am thinking that rear wheel alinement will control were the front sprocket runs. Also on my CB400F1 the rear sprocket goes on one way. The cut to reduce the width for the 520 chain was made on the outside. If the CB550 rear sprocket only mounts one way I would have the cut made on the inside of the rear sprocket. That way the centerline of the chain would be moved out away from the engine case.
          TomC in Ohio

thanks, tom. good info. not much i can do until i get the engine finished and mounted, but it's good to hear some feedback from someone running the same setup.