2006 carter 150 swap
 

I have a 2006 carter 150cc one seater and Im starting to have issues with it so I want to swap it for a 250cc. I've been looking at Honda CN250 motors from helix scooters. I know i'll have to do fabrication. my question is what to look for on these ebay motors?

heres a link to a cn250 im looking at. http://www.ebay.com/itm/1997-97-hond...dXSHjK&vxp=mtr

what other options do I have? I know I want a automatic or CVT but I don't know much about them. what engines can I put a CVT on?

That CN250 ebay link only says it was pulled from a 97 scooter. It doesn't tell you the mileage or hours. It also doesn't state anywhere that it actually ran/runs either.
If it was me,I'd probably just keep it simple and use another GY6 150 on your Carter, but I do understand wanting more power too. And I understand that if you're going to have to change the engine anyways, why not?
It's just I've seen some 250cc buggies on Craigslist that only cost around $500-$700 more than the engine your looking at. By the time you buy the harness,radiator, CDI, regulator,hoses, and other odds and ends, plus your time having to fabricate everything... I believe you would come out cheaper with just buying a 250cc buggy. And less aggravated.
Now if you were going to swap to a much larger engine like a 400-500cc Polaris.....

a 400cc sounds fun. what should I look for? i'm going to look at a 580cc snowmobile engine tomorrow. heres a link to a brake kit. would this fit my go kart and would it be a good upgrade?
http://www.ebay.com/itm/231383628290...%3AMEBIDX%3AIT

I'm not sure about that brake kit, that's above my pay grade. Don't know the length your lines should be, or if those will bolt onto your original mounts. I never even seen a single seater Carter buggy, except on the interwebz. You'll probably need some else to confirm that.
But it does look like a standard 150-250cc buggy brake kit.

ok thanks. has anyone one here put a snowmobile engine on a go kart? I see some on youtube