I have a 95 300 2x4 that is basically a similar engine to the trailblazers but a 300 instead of a 250.I have done some light porting and shaved the head .035".I am also considering a RCR pipe for it in the near future. I want to install a 34mm carb on it. It has a stock 30mm now. I know some of you have gone with the stock 400 scram. carbs on the trail blazers and I want to know the jetting so I have a baseline to start at.Does it help the bike any or do they just burn more gas?I need to know the main jet, pilot jet,needle # and the needle jet # and the slide cutaway too. I already have a rubber boot so mounting it will be easy.I also have some UFO'S left from my snowmobile and I might add one of them too.I know if I add a UFO I have to cut the pilot size in half. Is it worth all the trouble?

 

Sparkys,

I think it was worth it. On Celeste's Trailblazer it helped up the horsepower a bit. Here's what I'm running:

200 main jet (210 with UFO)

40 pilot jet (15 with UFO)

O-4 needle jet

6-CEY 6-3 jet needle

1 turn out on the pilot jet screw

The richest UFO

REMEMBER, This is just for the 250 the 300 might require a richer main.

Hope this helps!