Tim of DO THE TON
XS650 Junkie
BTW - this is the cam chain I'm using on my 750 rephased motor and the stock 650 I'm rebuilding right now. A quick search of BF05M x106 turns it up many places for around $20.
http://www.ebay.com/itm/Tsubaki-Hi-...106-BS05M-106-Yamaha-TT500-1981-/180988036374
http://www.amazon.com/Tsubaki-Hi-Performance-Chain-BF05M-BS05M-106/dp/B000GZN9UW
http://www.ebay.com/itm/Tsubaki-Hi-...106-BS05M-106-Yamaha-TT500-1981-/180988036374
http://www.amazon.com/Tsubaki-Hi-Performance-Chain-BF05M-BS05M-106/dp/B000GZN9UW