now then , just would like to know how much gear box oil to put in my montesa 315r 2000 and how much 2 stroke per litre thanks lee

just one more thing got a new piston and one side says (in) and the other says (5m) just wondering which side the exhorst side, av looked at apex motors and coping off the diagram 5m points to the exhorst side is it right thanks lee

Hi,

520ml in gear box, use something thin like the PJ1 75w Ultralight.

80:1 on your premix which is 62.5ml oil per 5 Litres of petrol.

'In' refers to the inlet side so should be on the carb side with the 5M at the exhaust side.

Cheers.

thanks m8