i have a blaster with trinity pipes, K&N filter, and no air box lid. i am not sure what mainjet to run. i know many companies tell you to run a bigger jet than what you need. this in turn gives quite a bit less power than what you should have. i am not too familiar with mikuni carbs either. i can dial in a 400ex awesome, but i need help on the blaster. what do you suggest for the mainjet? i like right around sea level and the temps outside are around 40 degrees F. also, how are the trinity pipes compared to ct, lrd, toomey, etc.? thanks

 

start with a 280 and go up from there. Toomey's tell you run a 310. with my bill's I ran a 280 at sea level.

 

what mods do you have done with it? also, do you read plugs the same way with two strokes as you do with four strokes? or will the plug look a different color since you are burning oil too?

 

they are a little darker than 4strokes. I have bill's pipe, pro circuit spark, 30mm carb, uni filter no lid, 14t spocket.