I have an 07 ZX10. I have the stock 17/40 setup. I put on a 16T front sprocket and love it! I wouldnt mind +1 in the rear and go with a 16/41 setup but keeping my stock chain will cause wheel base to shorten. I was hoping to get the correct length chain & keep tire as far back as I can on stock swing arm. Any advice? My chain just rubs now and I dont want anymore rub then what the 16T gives me. What would you guys suggest for a chain brand and length for a 16/41?