i'm not knocking the HMF pipe, jet kit, or K&N air filter i just had installed on my foreman..but i can't tell any difference at all..i raced another foreman today that was stock and he beat me by about a half of length..where are the extra gains at??. shouldn't i be able to out run a stock foreman..?? he did all of the air-fuel mixture test and the plug is running perfect..also i'm useing a 170 jet..so far the only thing i can tell is i have worse fuel mileage..if i've done something wrong please let me know..i got a little shut-up juice today after the foreman out ran mine..what kind of gains should i be getting..??should i be able to outrun another foreman..??also while racing today..i was trying to go from 4th to 5th..and accidently down shifted to 3rd with the rpm's pretty high..we didn't count that race..but do ya think i damaged the engine..?? seems to be running fine, but it was a pretty hard down shift..