Homemade 250

[OzFab]

Simple- I may even forget the narrowing inthe frame and just go straight box frame. Dimensions will vary on width of motor.
But basically motor next to driver, chain driven 6 speed. Have the shifter next to the driver so I can just pull up or down to shift and a clutch pedal at my feet.

Ok, a few points about the design of a standard shifter frame:
-They're made wide enough to have the engine next to the driver
-The reason the frame cuts in at the front is so the wheels have somewhere to turn to &, therefore, to reduce the width of the front track. If the rails were straight, either the steering would be limited or the track would be massive

I don't get what is bad about the shifter cart plans, are they not strong enough?
I'm too new to this to understand

nothing too simple, you want it to withstand the power of that engine.

IIWM, I'd be looking at a mini buggy; I've seen 125cc 2 stroke powered shifter karts that are absolute animals, obviously, a 250 will be worse.

I'm not saying don't do it, just be aware that it'll likely rip your socks off via your neck...

 

[Masonis1]

I guess I'll have to bottle neck the front. I want To turn- hah how long should the cart be and how wide? Dimensions?

 

[OzFab]

Long enough so you're somewhat comfortable. Once you figure that out, the wheelbase:track ratio should be around 4:3

 

[Masonis1]

4:3. I'm 5'8" what do you all recommend?

 

[OzFab]

Here is a pic posted by our resident race kart guru anderkart; see what you can take from that...

 

[Masonis1]

I found a steel provider, how much tube would I need? 30ft be enough?

 

[OzFab]

You'll need to do some math on that; finalise your design then calculate how much you need & add 10% for mistakes...

 

[Masonis1]

Alright I figure out the dimensions tonight

 

[itsid]

Oh and make sure that your cuts fit in the length of the raw material,
I'm pretty sure you will not get one 30ft tube, but rather 5 6ft tubes or something, so keep that in mind too.

'sid

 

[Masonis1]

Right I was hoping for a couple 8-10 ft pieces

 

[OzFab]

Usually, a length is around 20-25' & can be cut to whatever length you wish, check with your dealer...

 

[Masonis1]

Alright. So 1" pipe what wall thickness

 

[OzFab]

Actually, I'd use 1 1/4" 14ga

 

[Masonis1]

Ok I'll get some quotes. 25-30 feet should be enough? I'll go to see the rearend and steering, measure the width and adjust the frame on that.

 

[Masonis1]

So you think square tubing or pipe

 

[landuse]

Usually, a length is around 20-25' & can be cut to whatever length you wish, check with your dealer...

We buy tubing in 6m lengths here.

So you think square tubing or pipe

I would buy square tubing. In my mind it is easier to cut and weld because you don't have to fishmouth anything

 

[Masonis1]

Alright I'll look into it

 

[OzFab]

You make an interesting point, I don't recall ever seeing a square tube racing style kart... this just got interesting...

 

[Masonis1]

This stuff seems cheap, any of it work?

 

[loud1]

is that from Shapiro steel of of Natural Bridge and goodfellow?