Oil pump for Yamaha Aerox/ Minarelli engines.

The standard oil pump mixes at maximum 2% or 50:1 ratio. Some performance cylinder kits are designed to run on higher oil contents, e.g. MHR kits should be run at 33:1

This pump has 3 different colour coded fitment plates which can be changed to alter the ratio between 25:1 and 40:1

Yellow plate = 40:1

Green or blue plate = 33:1

Red plate = 25:1

IMPORTANT NOTE:
this pump is designed to work only with carbs which have an ball-bearing/ spring one way valve built in to the oil inlet nozzle.
The standard Aerox carb has this and this means that when the engine is not running the valve is shut off so oil cannot free-flow into the carb under gravity and only flows through when the engine is running and creating sufficient pressure from the pump.
If you fit this pump to an aftermarket carb which does not have the valve it is possible that over time the carb will slowly fill up with 2-stroke oil when the engine is not running.

If you have an aftermarket or non-standard carb it's easy to test which one you have by attempting to blow through the oil inlet on the carb. It should normally be impossible to do so as a person cant blow hard enough to open the internal valve. If you can blow through it then your carb does not have this valve and is not suitable for use with this pump.