Thread: My mini HotRod...

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Psycho,
I once built a cart very similiar to yours. The one I built didn't have nearly the HP yours has. Mine had an Yahama enduro 175 two stroke motor on it. I was young and didn't have the money for a smaller axle sprocket, it only had a top speed of 50 mph, but got there very quickly.
I always wanted to put a 4 banger on it as you did. Psychocart is a good name for what you have built there. Maybe Widow maker would be a better name.
You might want to consider putting a roll cage on that thing.
Bet it's a wild ride though.

Just noticed that you reduced the sprocket teeth on the back sprocket, you actually geared it up and can go even faster than the bike did assuming you still have the same front sprocket as the bike did.
What type of welding did you do on the frame, stick, mig or tig?

Ah I didn't think about how much smaller your rear tires are, you are right you would need a much smaller sprocket in the rear to get back to the orginal drive ratio of the bike. I overlooked that, just thinking about how wild a ride that thing will be. If you get any kind of traction you might just need some wheelie bars on it.

Yup, my rear wheels are only 12" high, vs the original GS750 wheel which is much bigger. I probably need an even smaller sprocket but hopefully I got it just right.

I welded everything with a 230v AC stick welder -- nothing fancy. I think I just used 6011 3/32 rod on almost everything. I used 7014 (I think) on my engine mount, and on my front steering components. I'm using 1 1/4 OD inch hot rolled steel pipe (1" ID) , and I notched the pipe for the joints. I've done the jump-up-and-down test on my frame, but that's it. I can't tell if my welds have good penetration. I really should weld up a test joint and cut it in half to see how good it is, but I just haven't done that yet.

I also have a MIG machine, but It's only a 120v 90amp max unit that uses flux core wire. I use that for thin sheet metal which I haven't used on my kart yet.

I do want to get a really nice MIG machine with shielding gas capibility , and also a better AC/DC Inverter ARC/TIG machine, but for now my stick machine is doing the job.

Adrian

Where are you going to mount the GPS Navigation system ?

Probably just in my pocket.. It's going to be more intersting to see how fast I'm able to get out of the drivers seat, and run into the bathroom to clean myself up.

Originally posted by David
Where are you going to mount the GPS Navigation system ?

If the GS750 4-cyl powered PsychoKart works out well, my next project might be building a KZ1300 6-cyl (Yes, SIX CYLINDER) powered PsychoKart with this:

Which steering wheel support are you referring to? The small lower tube, or the upper long tube? Everything is fully welded and nothing is tacked. I have NOT cleaned up the welds yet (Slag and berries are still there) so maybe that's what you're seeing? The small lower tube is perfect because I can see my penetration just by looking inside it. The joint that concerns me the most is my front spindle 'U' bracket welds -- If one of those let go, the entire front wheel dislodges.

This is NOT a safe machine by any measure. This machine is not even safe to look at, so please exercise caution when looking.

Originally posted by csf03716
i can appreciate the whole thing, BUT, lookin at one of the pictures(w/shifter handle)it looks as if you just "tacked" the cross tube of the steering wheel support...if you even question your welds, i would strongly suggest that you find someone who is certified like maybe a shop teacher and do it right....and have you considered some safety issues at all?...like a chain guard, a firewall, some front end protection for your feet, a belly pan, roll cage....im sorry but i wouldn't think of gettin in that thing with out any of the above just to start with.....good luck,