should i get a 240 kit if i trail ride?

Just b/c its 240 doesnt meant it anyless reliable just get a forged piston and block off the oil injection and you'll be fine. And its up to you if you NEED it but if you WANT it, go for it!
 
With a forged piston, jetted PROPERLY! and run premix a 240 is just as reliable as any other engine.
I trail ride in 3 & 4th gears and can walk away from all the big bikes because they are harder to ride in the trails, trails are where the Blasters RULE!
 
I am also wondering about the 240 kit on project blaster they have they kit called the fire breather but states for racing only would that hold up in trail conditions i would not want to have just a full blow drag quad