i think i might need my valves adjusted, it revs up real high when i accelerate in all out 5th. My friends raptor doent. Plus there is kinda a knocking noise when its in neutral, its not real loud just when i lean in next to it. When i pull the clutch it goes away though. Is this normal? and what differences should i notice when i get them adjusted? so when i get it out of a shop. i want to get my $$ worth for who ever i pay. i probably wont have the time to do this myself. thanks.