I put a 15t front on a 96 GSXR 750, somewhere I saw that the chain will really rub hard on the buffer on the swingarm... Is this going to be a problem? do I need to go back to the 16t front and go to a 48t rear?
Sounds like you have an opportunity to prevent a future problem and provide yourself some peace of mind. The larger counter sprocket increases chain life substantially.
That bike is notorious for eating the chain guide. It'll come off just about whatever sprocket you have on front. I glued mine down with epoxy on top and bottom of the swingarm and never had a problem. Then the 15 tooth will be fine. A 16/48 is a pretty low gear. I never remotely got close to using it. Your bike would wheelie everywhere. 16/46 was the lowest I ever used. Hope this helps.
it will most likely eat the guide up. i always recommend going up on the back rather than down in the front. a smaller countershaft sprocket will also increase chain wear. +3 on the rear is about equal to -1 up front, so gear accordingly.
I have a 15 front and a + 2 rear on my SRAD generation GSXR600, it did eat into it a bit, but only to a point and it has not got any worse. I think the larger rear helped lift it up some. I wouldn't thing -1/+2 is too radical of gearing for a GSXR600 for most tracks.
