Hey guys new here new to builds

[jd0401]

First off my brother and I live in colorado both have some welding experience and both looking to expand our knoweledge.

Second what we would like to accomplish is a vehicle somewhere between a off road go kart and a dune buggy/crawler.

The family loves speed and offroading on dirtbumpy roads stump jumping etc.

My questions having said what we want to accomplish what would be an appropriate size tubing for a 2 seater either mild steel or chrome molly. Is 1.25"x.095 sufficient?

As far as engine size im thinking 10hp+ depending on the specs of said engine.

Have many more questions but would like to begin there. Thanks in advance!

 

[OzFab]

It's better to use large diameter, thin wall tube than small, thick wall tube; 1.5" x 0.085"wt will be stronger but lighter...

 

[KartFab]

Some engines you could look into are:

Briggs and Stratton 16 hp v-twin
Honda gx340
Honda gx390
Honda gx620
Honda gx670
Honda gx630
Predator 420cc
Predator 670cc

Comet 40 series for transmission, wiould be good to have for these industrial engines. Also a reverse gearbox setup would be nice. You may consider doing a small motorcycle engine as well if you want speed, but then you gotta worry about shifting.

Chrome-moly tubing would need to be tig welded. Needs pre-heating past a certain wall thickness.

You will need to base your frame around the engine. Bigger buggies have dual a-arm fronts and rears. Front disc brakes and rear disc brake on the center. If I were doing a build like this I would do dual a-arm fronts and just a single rear swing arm.

 

[jd0401]

http://tapatalk.imageshack.com/v2/14/09/24/8b8212be5b61541c91a96e2c482c31e8.jpg

Basically this is what i have drawn up for the frame so far.
I would like to use a swingarm in the rear and dual a arms for the front suspension on this build until im a little more familiar with all aspects.

Is what I have drawn sufficient ?

 

[jd0401]

@fabroman thanks I will look into that specific size to get some prices