My 01 Blaster was running fine when I got it a couple months ago and now it barely starts after trying forever. I have to give it a lot of throttle to get it started and when it is I can't let off the gas or it dies. Even when I shift now I have to be quick so it doesn't die. I rode it in soft sand for a few miles before it started acting up so is it probably my carb? Maybe just my filter? I have a Uni with open airbox. HELP PLEASE!!!!!