I actualy thought it might be a swingarm cover at the pivot point at the frame.but seeing as you have your answer already.just thought i would add my 2 cents worth for whats it worth.i guess we know who to talk to then when we are in doubt.
1975 Z1 X 2 one i've had since new [many thanks to a great dad whos now since past]i've seen my son eyeing it every now and then.has 1075 kit,yosh cams,yosh pipe,29 smthbrs,rearsets.
1978 KZ650C that i race
1984 GPZ900
1972 CB350 building as another race bike
1982 CB750 w/836 kit,yosh cam
