I rode ATCs back in the 80s while growing up. Sold my last one and joined the USAF in 1986. 20 years or so later, I bought an ATC 70 on a whim that started a bout of 3 wheeler madness.
This was the first one after some TLC (seat repair and stickers), no before picture (please ignore Godzilla standing over it...):
A few years later, I bought this pile of parts:
And turned it into:
While working on that one, I bought this TRX for parts since it had an ATC engine and most of the pull start. The engine is in the 2nd ATC above.
I thought I would scrap the TRX since it was 1 foot in the grave (frame cracked) but it was so cute I decided to save it. It now has a 125cc Loncin engine with e-start and reverse:
It's the "Potty Quad". I almost sold it but after a couple of dune trips I decided it's nice to have a camp quad I can ride to the potty at 2AM in a less than fully functional state (me, not the quad).