i am wanting to build go cart that will be used for cruising the logging roads around my house. the trails are really narrow with alot of tight turns and during the winter it can get pretty wet in the bottoms.

i will be using a lawn mower axle with the diff welded solid and a 21 horse v twin out of a troy built super bronco. im going to put a transmission out of an older snapper mower, change from a pulley to chain system and sprocket it low for hills. slap on some really wide 4 wheeler tires and have some fun with it. the only money i will be out is to build the frame. i have a cheapo summit poly racing seat to put in it.

now my question is on the suspension. should i go with no suspension to keep it simple and light then stuff alot of padding on the seat. or go ifs and use some coil overs from a scooter. i wanna keep the back end solid to keep it simple no matter what

If you want to drive it fast you will need suspension and correct toe out on turns (Ackerman)

speed isnt as important as being light weight.

i just want something i can flog the crap out of and not really worry about anything breaking

If you dont really want a lot of suspension, then look into a honda odessey...the off road go kart, not the mini van. They had a small amount off suspension travel unlike the later honda pilot. Those will give you some ideas.

PM the kid from New Zealand. I'm sure he could help you out.

i've welded lawnmower diffs before ,they break.
northern tool has solid axle shaft kits.

I would just set up a straight axle like on a lawn mower, just something to get the tires on the ground so you can steer.

maybe consider a IFS rear from like a subaru or somthing of the sort. there light and can be had at any junkyard and some have LSD diffs. im sure the 21 HP motor you have will trun the tires and you could use all the suspension from the subaru. just a thought i always wanted to try, jason.