250-500cc Name that crud part II

Here is a couple of photos of my stock coolant from my 2012 wr300 after letting it settle over night. The coolant came out looking like Trinity river water, but came back to soft blue green after the crud settled. I did a complete drain it of the system to check on my shifter star. This coolant came out of fairly neq wr300 which had about 4 or 5 trail rides under its belt. Any ideas?

Originally I did a search and added these photos a 4 stroke post. I thought it might be better served on the 2 stroke forum.

Thanks

Unfortunately i can't name that crud,so no prize for me. However i can't wait to hear the answer!! GL

I've seen that others here have had similar experience with the coolant. Mine looked like mud also after only a few rides.

it's 2011 on up coolant.
ask me how i know. some of it's on my right boot! stil trying to figure out what the hell they were using.
i think they knew the axe was coming, like they did in 87...we were getting boxes of bikes with beer bottles and food wrappers and underwear in them @ CSR.

so im thinkin they peed in our radiators! "sooka disa americanos'a yous gona overheata fora surea nowa"

if i ever make it italy someone's gittin slapped.

It's block seal tabs that Husqvarna adds to all radiators.

i never thought of that.

well, its gone now on mine! i'd rather have XF in my radiators than that stuff! braaap!

Anybody have any techniques for burping the radiator? I did not see any air bleed screw on the head or elsewhere. My buddy with a KTM 300 said his manual said to get the bike at a 45 degree angle and then crack the radiator cap. Any ideas?

i removed my t-stat with some mods. then filled and tipped side to side then idled and repeated. rads sit up pretty high i dont think there's and air entrapment issue on these least that i know of mine has none.