I used to have them as a kid. I had ATC90 trikes at first, we used to bore and stroke them to 250cc and even 310cc, ran them on methanol. Damn dangerous without suspension. I built 2 x trikes out of bikes too: one from a XL185 (year 10 school science project), the other from a XR250 in the 90's. I always intended to buy a new ATC350X in 1986/7 but they were stopped in production worldwide. Never understood why, Quads are 10x more dangerous than a trike. At least you can steer a trike, Quads just plough understeer or roll. You steer a trike using the throttle and leaning out into a corner like a Jetski (loading up the left rear tyre).
Anyway, been thinking about getting one again. If I can't find one i'll buy an old XR600 or IT490 or something like that and make another one. Would love to make one out of a newer KTM but it ends up being a bit pricey!
That one above is the last of them in 1986. A few were sold in Canada and the UK in 1987 as 1987 models but looked the same.
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