Frosty the mock type or the TS/TM250 Oldfart refers to is really only a TS frame. The rest is 100% TM250
No offence intended here but I really don't understand why people who restore the TM's don't seem so interested in the '75 M models? They were the best of the lot after all and for mine it will become the more collectable in time as it is a model of some significance being the very last of the basic oldschool piston port engines design. To restore a TM250 is not cheap if you wish it to live up to expectations. Conservatively guestimating, plastics and tank, paint, stickers all up around $1000, wheels about the same, engine work say $500, shocks $400, cables $70, seat $100, tyres $200, bearings/chain/sprockets/brakes/ $250, this is not taking into account parts that are missing or need replating or the exhaust, airfilter, ignition, bars/levers/grips but with your initial purchase price of a grand the bike is already into you for $4000 or more for which money you could probably hunt a nice one down that's had all the hard work done. Maybe not the satisfaction but eh, it's all in your perspective. Just a different slant is all but either way you'll still end up with a sweet TM250