In certain areas during the heyday of trikes, there was a class that would take 125 2-stroke trikes. I highly doubt it could be one of those, especially if he said it was a big red. But, How many times do you see things wrongly listed on ebay or craigslist or other places. Buyer beware.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90