I have a 73 750 Tiger that is actually the 724. It needs to be rebored, so my question is what size should we bore the thing to? The stock bore is the 75 mm 724 size. When they went to the actual 750 (744) they they used a different barrel casting and went to 76 mm bores. So what would the first overbore be on my existing early castings? Thanks for any info I can get!