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i have a set of rear rupp turbines that fit the old axle tightly but the new axle they slip on but have a little play. is their an easy way to fix that issue. its a go power sport 1 inch axle.
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Use a digital caliper to find the true diameter of your axle. Find out the inside diameter of your wheel hubs. Calculate how much play exists. Knowing how much play in thousandths of an inch will help determine what you can use to shim the axle.
This might fix your problem. Electrical tape. Where the hub sits on the axle, wrap electrical tape, but don't overlap it. Cut it just short of touching itself. Don't stretch it. You don't want thin spots in the tape and thick spots in other areas. The idea of the tape is to take up the slop you have with the axle you bought. If one layer does not work, try two layers. I would not try more than two layers as the tape will heat up with driving the kart and possibly slip out of place.
If you can find really thin metal sheets, like what they make stainless steel feeler gauges from, that would be much better than the electrical tape. A craft or hobby shop might have thin rolls of copper, aluminum or steel, usually used for embossing projects. One or two layers of thin metal will work good. Don't overlap the ends.
An alternate route is buying one of the higher quality deluxe flexpruf solid steel Azusa axles from a place like Go Kart Galaxy ($45 to $54) or have a machine shop make an axle for you.
