i just picked up a 98 banshee with alot of work done to it when i rode it 4 weeks ago it was flying. rode it up and down the street 2 weeks ago was great. i go and jump on it to get ready to take out and the thing starts sounds great but hit the gas and sounds deep and wont go faster than 5 mph in any gear. WFT does it need a tune up ? is there something im not seeing ? anyone got any ideas of whats wrong!