My buddy has a 07 m8 it starts and runs good but after a wot run if you back off to 1/4 to half throttle it starts to bog down till it stalls if you keep it there if you let of it will die but if you play with the throttle you can catch it and it will go again.to me it seems to be loading up with fuel we changed the exaust cables checked the reeds but they are brand new.any help would be great.