For a 1991 Suzuki RM 125, it is recommended to use a high-quality 2-stroke engine oil specifically designed for motorcycles. Look for an oil that meets JASO FC or FD specifications for optimal performance and protection. Mixing the oil with gasoline usually follows a 32:1 ratio, but it’s always good to consult the owner’s manual for specific recommendations.
31:1
There is no rm 125 fourstroke they make a drz.
120mm from the top
36:1
32 TO 1
it is 50 to one with mc 1 oil
Castol TTS Oil Mixed at 40:1
700cc / .73qt
These (link below) are for a 08 RM 125.
castrol tts 40:10
Will a 94 rm 125 engine fit on a 2000 rm frame?
If you are talking a RM 125 then I would use Redline shockproof gear oil ......IT IS AMAZING.