regarding the GX390 engine on the cart..
There's tons of hop-up parts for the engine though, since it's raced a lot.
Seen one putting out 30 hp. Parts for the engine and such are REAL easy.
As for the frame-can't answer that one-haven't seen it. I ride a mini-buggy... But, I am considering using this engine as a power plant on a scratch built model with some suspension since you can get them easily in copies from harbor freight and all the high performance parts work on it also.
Having rambled all that - I would say wait on a real suspension. I love mine and it's easy on me. Plus, I almost made a friend pee in his pants last weekend when he rode with me for the first time.
Now, that's good riding.
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