just picked up a mint condition sp02, but its not running right, will not rev over 7 out of gear,same in 1st 2nd gear,jumps around seems like its choked ok in 4th 5th, i can switch my fuel tap just so there is a lil fuel comming thow and it runs fine ,untill carb runs out of fuel,also wen take air box off it spits fuel out of carb,i think the main jet is 2 big, needle clip is on top letting smallest amout of fuel thow, iv tryed every carb setting i can, so if any 1 can help me with it plzzzzz do, main jet looks like its been in and out a few times bye last owner