The forks are the same diameter as Rm80 (skinny) just shorter legs.
engine in a 185 is 185 only some of the cogs will fit but different ratios and the clutch will do a TM125. The hubs are larger diameter than TM125 and weigh the same ... steel rims are heavy... triples are small and cast iron lower alloy top. seat is heavier and wont fit a TM.
Only useful for TM125 swaps but not much. Hmmm if you get stuck with the engine freaky and i can get that up here Id take that off ya as long as I can get it to go via Loz for a bit of a fiddle