I have a I think 1967 ( I can get exact year ) sprint 90. Guy who gave it to me took the spark plug out and never put it back in. the Maryland humidity did it's job.
I remove the motor and head had it soaking in all kinds of miracle liquid and ATF fluid for the last two months. Motor in neutral hit it with a soft blow hammer and a chunk of wood no luck.
I have seen a video of mixing gasoline and ATF Fluid, lighting it on fire for an hour and then hitting it.
Scooters west said something about cutting the Cylinder and connecting rod off? My manual says take the case apart. I know the reason that this bike got parked because the stater was completely trashed. I was hoping to free the piston may be replace the cylinder and piston replace all the cables wire harness rebuild stater put it all back together and see how it goes. The odometer reads 4000 miles and I'm thinking it's very possible the motor has never been removed or worked on.
It hasn't been ran since the 80s. The guy who gave it to me was the second owner the original owner s his wife's father.
Help please! New to vespa and this forum.
Thanks