GENTLEMAN my 70 is ALIVE!!!!!! it hasnt ran since the late 80`s.It is a 1985 & I`m not sure for all of them but this was my problem. Of coarse the carb was full honey looking gas but that easy to fix.2nd problem was a little harder to find.I couldn`t get any spark at the plug but with my meter I was reading thru @ the coil right a volt.
so i thought i`ll pull the cover and look at the stator and i found that it has points.so a new set and put it back together and she fired right up first pull.
just like my 110 when i was a kid it would start after sitting year it seem like,great running bikes.i need to get Pete (LTR450) to help me post up some video or pics.now this morning i`m going out to put that 125 together although i`m thinking it is going to be missing parts but time will tell.and yes it is a honda 125 atc,it even says that on the frame near the gas tank.it is kind of like a 110 but a 125 so who knows.but your right these things are a blast from past and i cant wait until the 70 DUMONT REGATTA.