I have a 2001 warrior that sat for years.It ran fine last time It ran it 2 1/2 years ago.Just had the shop put a new clutch in it.when i got it back from them it wasn't getting any spark when I take the plug out and turn it over with starter.If I pull start it will run if I keep the rpm's above 1/2 throttle.It has a new plug.does anyone know whats going on?????????