250-500cc Bowser Premixing -

What methods do people use when filling up at the bowser to ensure you get the oil/fuel mixing correctly in the tank?

I have just bought a WR300, and are putting a Acerbis bag on the back to hold a syringe and oil container. But when filling the tank and mixing the oil, how do people ensure its correctly mixed in the fuel?? Leave an air gap and try and slosh the fuel around inside the tank?

Thats possibly the only way you can really?

Yep. Have a small container of premix, usually enough for 2 gallons, and mix it one gallon at a time. Slosh for effect.

I pre-measure into 100ml bottles.. Double bottled for safety when carried on my bike with a pair of nitrile gloves.. When needed at the
gas station I just do the slosh thing or try to find a old oil bottle or windshield washer jug (rinse with a bit of gas first).. Cheers..

Excellent. Thats a nice little carry bag too.. might have to go oil container shopping

I've emptied the tank to know exactly how much l can squeeze in there. I carry a length of solder that l've marked to gauge the amount of fuel l have and l use a baby bottle that l have markings for my ratio (40:1 @ 225ml +/-)
So when l hit reserve and can make it to a bowser, l empty the oil in first and use the bowser pump to mix the fuel.

I put the oil in first, then pump 3-4 gallons in the container.. The flow from the fuel pump mixes it all up....