I studded my old dirt tires, and i started my bike today and it didnt want to start after sitting for a couple months or so.. I finally got it going, but it was sputtering and popping like crazy.. I dont want to take it out on the lake riding like that.. Do i have to jet down or up? Up i would say right? What do you guys recommend? Just change the mains? For temps between say 20 degrees and 40 degrees..