Hey, I have a Yamaha exciter 440 one of the old ones I think its a 75 but not sure my normal sled is a 2003 Arctic Cat mountain cat 800. I just use the yamaha to rip up the town and its way way far from stock, well everything but the motor is moded and I wanna get more power out of the motor so if anyone has any sugestions please tell me, anything from boaring,porting,electrical or whatever else.