Vintage Dirt Bike Q & A

Bike is running for second time. Rebuilt top end, developed air leak, runaway engine. Split case, replaced seals, bearings. Still a bit rich, but hard to properly jet when weather is 45 degrees lower than I expect to ride it in.
So, I now am starting to look at replacing worn chain/sprockets. I notice these rear sprockets are offset and most I see new are not. There is a steel on on DaBay, but I thought I might save some scratch buying a set of both gears and chain. Where are you guys buying these?? I'm assuming any 520 non-o-ring chain will work, but what about that offset rear sprocket??

Thanks, Mitch

Mitch- Long time ago someone used to make adapters I think it was Sprocket Specialities but have not seen them for a long time. I bought my rear one off ebay about a year ago for $16.99 and $6.00 shipping on a buy it now. The vendor was mrsuperdeals in columbus oh. Hope this helps.Gary

Mitch, I've found both a steel rear and aluminum rear on "that auction site". They show up quite often. Stock chain lenth is 104 links, yes any 520 will do it.
Remember the 75-76 CR will work on the MR
Sprocket Specailist (specailties?) also list them, but again, I found them cheaper.