want faster blaster

you mean top end speed ????
try a bigger 14 tooth front sprocket, but in that case your existing chain will be about 2 full links too short, thay have chain and sprocket kits on ebay for around $60 that include a new chain, 14t front sprocket and smaller rear sprocket, the ad will say "more speed"
if your talkin quickness/more power on the trails, an aftermarket pipe/silencer, uni or k&n filter, and rejet the carb will be your cheapest route, but still $2-300 with a used pipe
 
Pipes, reeds, shaved head, porting, timing advance, regear, different sized tires, stroker crank, port job, the options are endless. Start off with an exhaust and air filter with a rejet.