The machine is my boys an is an 02. I know it's not a dirt bike but it does have a 9:1 compression 4 stroke on it. The darn thing is spuddering like it's running out of feul, I've reset the float to a higher possition to let more feul in the bowl but still after a hard lap it's still running out. I've also checked every thing and cleaned every thing so nothings stoped up. I run high octane in it. Any advice would greatly be accepted.