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Old 14-01-2009
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JCJC JCJC is offline
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Join Date: Nov 2005
Location: Oxon
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Looking in the manual, looks like the 84t spur was standard, and on the original MR4BC. that looks like ZM-S84
SG-4884 is listed as precision 84t spur.
Other numbers I cannot find, there was a 78t spur.

http://www.yokomousa.com/manuals/catalog_p40p41.pdf parts list Yokomo USA
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