Speed costs money! how fast you want to go? gutting your pipe was not a good thing, the motor needs back pressure you need to get a full exhaust, a stage 2 hot cam will give you more mid and bottom end power, take the air box lid off and try a 180 main jet take that 12 tooth sprocket off and put a 14 on the front you will get a little more top end you can do a piston and get more power if you are just play riding go with a 12-5-1 CP that way you can still run 93 octane i have 14-1 and have to run 110 at $9.00 a gal but my motor makes about 61hp stock is about 45 hp if i can help let me know.