I'm going to start building out a 670 predator. I'm going to start building an intake adapter this weekend.

I see some guys running 32mm's on 23hp vanguards, so that is most likely what I'm going to start off trying. Any other thoughts or suggestions? I've only glanced at it on the motor, but it currently has a 2 barrel carb, size unknown.

I'll be building an exhaust to match, and upgrading the valve train with what parts I can find that fit. I've verified most the gx390 valve train will fit via Vegas Carts.

Do I want a powerjet kit as well?

Check out the HeyMow forum...may find some interesting info there for what you're trying to do, also....not saying people here can't answer your question...but, there is some good info on the smaller engines over there.


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10-4, thanks. I know single cylinder small engines quite well, but v-twins is a new game. I don't know what they like. Guys have been racing mowers and buggies a lot longer than we've been modding mud motors, I'll check it out.