New here! I bought my 2017 gsx-s in April with 2500 miles on it and put a Dano's ecu flash, quickshifter, and BMC air filter on it. Then I added some Michelin Road 5's (190/55 in the rear). Just yesterday I installed a new 520 chain with a 16/47 sprocket setup. Holy moly is this thing fun now! I was trying to get it to wheelie easier, and this definitely did the trick. I may even go to a 48 tooth rear for a little more fun. I can now clutch up 1st, 2nd, and 3rd with relative ease. 3rd is a little tougher, but still doable. Now the bike has 5000 miles on it and I've had zero issues. I owned a Triumph speed triple previously, so I'm loving the Japanese reliability. Might do the exhaust and rear shock next, but I'm not sure yet. I've been eyeing up the new streetfighter v4, so I'm not sure if I want to sink any more money into this one.