Sorry to hear that he's no long with us. Some of his work was the first stuff i followed. Looking at what he did, was to essentially insert a 150 or 250 cc output shaft for a matching reverse box into the bored end of a piece of common shaft. After dealing with pillow block mounted jackshafts too often, i would recommend revising the design for vertical mount bearings (axle hangars and clamshells). other than that, it's a matter of getting a reverse box and output shaft and finding a local machine shop to give you a good on center bore in the common shaft. then weld it up. most expensive bit is the reverse box parts.
Other method of doing the something along the same lines would be to put the reverse box in line with the engine output shaft and having someone mate a buggy output shaft to a hollow hub with the splined portion of the original bike/quad sprocket inside the hollow hub. That approach would require less area at the jackshaft--to put the reverse box on the jackshaft at the pivot point may require new trailing arm mounts.
Last edited by x-bird; 10-20-2017 at 07:47 AM.
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