I just installed a quickshot 3 acc. pump cover on a 2002 yamaha yz426. I started it up and it was running funky and popping, i pulled the choke out and it ran fine. Now it wont run unless the choke is out, but it runs great with the choke out. Do i need to jet up due to this upgrade? i put an FMF powercore 4 on it at the same time as the quickshot, some much needed advice would be awesome, PLEASE HELP!