See this. A member generated technical drawings for it! http://vfrworld.com/forums/showthread.php/42345-Made-my-own-rear-hub-spanner Note aside from the diameter measurement it has to be somewhat thin. Thus many go for the OEM tool which we know is thin enough. Alternate discussions at the below url, where people throw in some of the aftermarket ones they have bought. Note some of the discussion is about the shock spanner which is much smaller: http://vfrworld.com/forums/showthre...er-or-Honda-C-spanner/page2?highlight=SPANNER
Do you have the OEM tool kit for your bike? If so, I think that the chain adjustment tool is included...
