Ive got a 01 blaster, and its not revving threw the power band like it used to, it sat for about 4 months and i just went out to ride a little and it just doesnt have the go..Has spark, air, and fuel, and it will run until i hit the power band but it wont pucker me up like it should, i can turn off the gas and right before it dies it will scream! but when i turn the gas back on nothing, ive put in a new plug, fresh pre mixed gas, still same problem, any one help?