When you mention clearance, do you mean between the front of the rear tire and the back of the swing arm? If so, then yes, it's a little closer. On my bike, my chain is stretched a bit and needs replacing. I was wondering if that might cause the tire to be even closer to the swing arm. If you increase the diameter of the rear sprocket (without changing the length of the chain also), that could have an impact. I don't know for sure, however, because I did the front sprocket, as opposed to the rear.
Have you considered doing the front sprocket as opposed to the rear?
Yes that is what I was talking about, the clearance between the front of the tire and the swing arm. That's the only place I see there could be an issue if there is one at all.
Since I went up 3 teeth on the rear sprocket and kept the front stock I'm thinking that will make it a little tight.
Before long I will be due for a new chain anyway so if everything doesn't look the way I want it I am just going to get a new setup with a stock # of teeth on the rear sprocket and go down one tooth on the front, then caliberate my speedohealer accordingly.
I went down one tooth on the front of my 06 gixxer1000 with the rear sprocket stock # of teeth and even though they are both different bikes the -1 front on the gix1000 feels very similar to the +3 rear on the r1. Even the max speeds I reach in each gear are very close to one another so I don't think I would be dissapointed with -1 on the r1.
Now my rc-51 on the other hand with -1/+2 is a bit rediculous. Its a ton of fun to ride
but gears like that destroyed the top end and its very noticable even if I don't go for max speed. Anyway I'm getting off topic a bit, sorry for ramblin