Vintage Dirt Bike Q & A

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 Post subject: 1976 sprockets for MR250
PostPosted: Tue Mar 21, 2006 3:29 pm 
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Joined: Thu Jan 05, 2006 1:35 pm
Posts: 344
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


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 Post subject:
PostPosted: Tue Mar 21, 2006 5:26 pm 
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Joined: Tue Jan 11, 2005 6:10 pm
Posts: 161
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


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 Post subject:
PostPosted: Fri Mar 24, 2006 4:57 pm 
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Joined: Mon Jan 09, 2006 12:19 pm
Posts: 54
Location: Boston, MA
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.


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