Huckaberry

hey...question for ya.....i got a 2006 banshee with T-5 pipes, jetted, and the milled out??.......but i was wondering...when the bike gets up to high rpm it runs on one cylinder....didn't know if there made that way, like stages or what.....it still huals ass....i just raced a 2010 yfz 450 and i was keeping right there with him ..my buddy said i might need a new coil??....but ya i don't know a whole alot about 2 strokes but im learning so if you got ANY pointers let me know...thanks