I just picked up a Helix 150 with a new carb, cdi, coil, battery, and wiring harness. The guy I bought it off from said he was fed up with trying to get it running, so he sold it to me for $350. I took it home and found out it had a bad vacuum hose on it. I changed that out, and behold it runs like a top!!!
It does need a little "prettying up", but it's a good solid buggy, and is all there!
