Yeah i agree with redsox you are mutch better off buying a brand name second hand unit over a cheap new one any day, and with the cash you save you can buy a whole bunch of extra welding rods and grinding disks... Also if you buy a cheep 90 amp welder it will be limited to a 2.6mm rods, have no idea what that is in inches but it will do most jobs for a go kart but the problem with the small machines is they overheat very easily and once they are hot they will work for small periods of time and than cut out again leaving you frustrated and waiting, That sears machine is a great buy it will out perform and out live any cheap welder out there, And as for learing to weld get a welder read up on a few tips on welding and than go out and start welding things together spen a good afternoon on your welder pacticing before you start to attack your kart, and also dont use galvinized steel if it's thin as it tends to be more tricky to start with!
