Hey guys. Just wondering if someone can answer this question. Are gas caps universal throughout the CBRs? Like are the bolt patterns and diameter the same from say a 1998 CBR600 and a 1998 CBR900RR? I want to buy a handle that bolts onto the ring around the gas cap for my woman when we're riding 2-up. There are a few companies offering different handles, but most don't specify compatibility with a 1998 900RR specifically. Yet they are compatible with a 600RR, 929, 954 etc. Any insight would be greatly appreciated!!