I just bought a 01 Polaris Sportsman 90 for $20 and it needed a carb since it didn't have one and also turned out the cdi was bad. I bought a carb for $20 aftermarket and a cheap $8 cdi and now it runs but after 1/4 throttle it acts like its out of gas so i put a pod filter on it (since i didn't have original air box) and to get it to run i had to tape over 3/4 of the pod filter. I'm thinking it might need a bigger main jet. What do y'all think? could it be the pod filter giving it to much air? do i need the original air box or is it the main jet? After the tape over the pod filter it runs at full throttle now and seems to run ok but i still think it could have a little more.