Im building a cafe bike out of a 73 cb500 , im using rc51 rearsets , the ones i won off ebay , didnt have the brake lever , im having trouble finding one but have found many 600rr ones on ebay . i was wondering if anyone know if the shaft they piviot on is the same diameter , if so i think i could use a rr one , i dont need the brake cylinder stuff to line up just where it the lever piviots on .