A FRIEND OF MINE HAS AN 03 BLASTER HE PUT AN FMF SST PIPE AND IT WAS FINE,UNTIL HE PUT AN TWIST THROTLE ON IT AND NO SPARK. ITS A MOTION PRO.ANY HELP WOULD BE VERY COOL.THANKS

Check the coil next to the carb, the coil on mine came off, when you put the twist throttle on he might of bumped the coil, its an orange wire, otherwise, I dont know

Does that bike have the TORS tip over throttle kill system on it? When you put twist throttles on banshee's and other yamaha quads with this system, you need to remove the tors as there isn't a provision for plugging in to it with the new throttle. I'm not sure if the blaster has one though.

My blaster has a twist, and the tors is still on, but its disconnected from the system

The TORS may be the problem then. It might be to much hassle to remove it if there are block offs that need to be installed. What was disconnected on yours Shocker?

to remove the tors brom a blaster/banshee you just need a carb top(s), and an idle speed screw set which you vcan get at most atv parts places.