Fouling plugs

[cladoo]

My 2010 300 Nambotin has been fouling plugs quite often for the last couple of years. I thought I had it fixed when I found my crankcase gasket was causing my engine to suck in tranny oil.i fixed that but this week for the first ride of the season it has fouled two plugs already. I've been using the same oil and buy the same gas from the same station. Could I have a bad jug of premix oil? I use Amsoil Saber 80:1 and Shell V Power gas. The bike will run all day with now problems it's just that first start up for the day that it fouls!

[Jakobi]

New plugs gapped correctly? Using a BR8ES/G? I don't rate the irridiums.

Drop the crank case bolt and see if you have excess fuel/oil pooled up in there before the 1st start maybe.

[(F5)]

Swap out the coil and cap from another bike for giggles.

Maybe float jet too. What's your mileage like?
Plugs fail due to bad spark or rich mixture. Oil is but a minor inconvenience. We all run 40:1 & cant think last time anyone actually fouled a plug. Usually just get a bit gurgly in top end and you realise that the plug is a year old..

[shawbagga]

Stupid question but you're not leaving it on the choke too long are you? 10 seconds max then just give it revs to warm it up.

[cladoo]

New plug, new cap and high tension lead. New stator as my lighting coil burned out. Not runing rich when it starts. I can ride all day without issues, just on cold start up. Mileage is good. New top end last year and I didn't ride much as we had a OHV fire ban and I hurt myself too! Not leaving the choke on more than 10 secs. There are a few local guys that have had issues with Shell V Power gas doing the same thing on cold starts. So I'm going to try some different gas. If that doesn't work then I will try some other oil.

[(F5)]

What's your needle man? We're all loving the RM250 erm, NEDW I think. Or is it J? Written down somewhere. Well actually about 10foot below where I sit at the breakfast bar. Although it isn't Breakfast. Confusing. . .

On a piece of paper clothespegged to my test power supply. Why didn't I write it in the log book I keep for all my bikes?

It's an Enigma wrapped in a Mystery.
Tied up in a Puzzle.

You know I'm going to try a 170 next weekend. Seem to be needing leaner settings than the others.
Might be the head mods.

So I'm drinking APA. . .