Does anyone know anything about a motor on a 1983 RM125

Its a 125cc two stroke:) does that help?

I would recomend that you get a factory service manual at at least pull the top end down, mic the piston and cylinder bore to ensure that they are in-spec. Check out the reeds, clean the carb and air filter and go for a ride. Of course if you come accross anything thats out of spec get it fixed up. You'll probably be ok on the piston and cylinder but might as well have a gasket set and a pair of rings handy. Be sure to use quality pre-mix and change the trans oil and antifreeze (if its water cooled) fairly often.


good luck

What's up dude? :cool:
Here you can find how its built.
http://www.alpha-sports.com/suzuki_parts.htm

ASAP purchase book by Erik Gorr : "Motocross performance Handbook" third edition. Real cool stuff.

See ya.