2 weeks ago: I ended up getting this for $600. Fresh paint on frame. Low cost “clone” engine with a couple hundred put into nice internals, which I’m told is a standard practice. Needed a front hub and wheel. The biggest issue is that it’s an adult size kart and I’ve kid size kids.
The easy part was moving the seat forward. I just had to drill a few holes in the too large seat and fab a back brace for it. Not having the first clue what I was doing, I ordered a front hub, wheel and related hardware. When that stuff arrived putting the tire on the wheel was a pita involving the oven and a lot of cursing. That has motivated me to look for a local shop that puts kart tires on.
The good news was that the tire fit on the wheel, the wheel on the hub, and the hub and spacers on axle. Symptomatic of not knowing what I’m doing, today I ordered more parts (a big nut and more spacers), and the wheel actually only fit on correctly when installed backwards. But it does still work.
The harder part was going to be making some aux pedals that would be ~7" forward of the normal pedals. The connection between pedals needed to be stiff in push and pull, and also rotate at both ends. Imagine two parallel pedals, one in front of the other. Both pedals rotate around their base. Now attach the top of the two pedals together and you can imagine how the attachment has to have freedom at it’s fastening points because the angles between linkage attachment and pedals are going to change as the forward pedal is depressed. I wargamed a lot of ideas, bought a variety of hardware and then this past weekend dove into it. And it turned out very nice.
Here’s a pic of the linkage. I made the pedal out of a Home Depot hinge and a piece of steel. It had go on a piece of 2x4 because the boy’s ankles have to clear the steering linkage that passes underneath.
A piece of steel 1x1" box is the primary linkage piece. I used a 3/8" collars on each side of the steel 1x1" box to fasten it to the normal gas and brake pedals, which are really more of a 3/8" steel bar then a real “pedal”. The important thing tho is that the normal gas and brake “pedals” are free to rotate inside of the steel 1x1" box.
To fasten the box to the aux pedal, ~7" forward I took a pair of threaded eye-bolts and flattened the circular eye’s with a press into an oval shape. I also had to grind off some material, but eventually the eye’s fit inside of the 1x1" box. Then I put a bolt thru the 1x1" box and the eye so the eye bolt was free to rotate some. And finally fastened the eye bolt to the pedal. Viola.
For size perspective, here’s a pic of the kart with #1 son, with a stupid expression on his face, in it. It’s odd how all 3 boys interpret the word “smile” as “put a stupid smirk on your face”.