OK, So I have this 06 CR 250, Ive been changing my gear oil after every ride and Ive come to notice that its not clear. It goes in golden and even after 1 heat cycle it comes out dark. Im using castrol 10-40 motorcycle oil. Im not sure if its the oil itself or if there is something else is wrong. Also the bike is like half fouling plugs. It will run perfect then if I'm not on the throttle wide open even for a very short period like less then 2 mins it runs perfect for the first 1/3 of the throttle but very rough for the rest of it. It can be cleared out but takes awhile and its not constant so I kinda don't know when its going to happen. Im running Klots super technoplate at 40:1 with shell 93 and have run it in the past on this bike with zero probs.