why did you lean out your main? That would explain why your pistons have more carbon build up. you need MORE fuel to control piston cooling and wash. You do NOT want alot of carbon build up on the outer edges of your piston. that can cause excessive heat in your pistons.
the white is just calcium build up from the 2-stroke oil. It can be caused by too much oil, fuel quality or the engines operating period.
it probably isn't as bad as the picture though.
I have a friend that is giving me a set of fox floats off of his 07 xrs. I heard they are 1" longer than the xp shocks. Will they work or will they cause issues with the handling or anything else?
Yes they are from a 2 stroke. That's what they should look like. that is only about 25-30 seconds on the plugs. they read a chocolate brown smoke ring that are 2mm thick(Perfect main jet).
You will not get a good reading on your "mains" if you use the same plugs. You need to warm up the machine on old plugs, shut it off, replace with brand new plugs,start up and do a wide open pull and hold it open for 6-10 seconds, then shut down right away after. Take out plugs, replace with old...