I clean and lube the chain every week. It seems to be ok.

The only reason I got another Vortek is it was the only thing I could get quickly.

Nobody makes a steel 520 rear for the SV.:panic:

Keep an eye out on it in that case

A chain on that sprocket had to have taken a beaten. I think you should have replaced that chain at the same time as the spocket. How many miles were on that Vortex?

James

lack of skills is evident here, let me help

here steel sprocket

FAIL! thats 525, not 520. send me that old vortex, lemme crossref with some other stuff I might have and I'll see if I cant find a steel 520 rear off something else that would work. I note a lot of modern SS bikes have extremely similar style sprockets at least, so something is bound to match sooner or later.

fixed