All 2st plug fouling

just completly rebuilt my 00 wr 360, put everything back to stock jetting, runs fine feels a tad rich but everytime I go to ride it after its been sitting a while (i.e. between weekends) it won't start. I pull the plug and sure enough its fouled. However it nevers fouls when I'm riding even when I'm idling along for long periods? Ive never come across this before, am I right on the cusp, I'm running at 32:1 for the run in just as the manual states, any ideas

Could the float be getting stuck in the bowl from sitting?

Could you post a pic of your plug? Is it wet from gas or all spooged up from oil? Put a new plug in it and go ride it and do a plug check afterwards.

you can tell alot from how the plug looks. 32:1 sounds a liitle rich for mixture.

That's a pretty rich gas/oil mixture- what oil you using?

Castrol TTR, the mixture is as the manual states for run in, I might try one hotter plug, what does dry fouling normally indicate?

I always have and always will run 32:1 and I don't foul plugs.
Jet for the ratio, don't change the ratio for the jets!

All 3 of my smokers and my weedwacker get the same drink from the same can and I rarely foul plugs (once a year maybe...). Makes life easy and provides adequate lubrication to their lower ends. Jetting the carb is much easier than rebuilding/replacing cranks and bearings.