That's a nice tidy bike Critta, the bottom of the case and top of the cylinder is just dirt, it hasn't been washed off properly, I used stuff called Alu-brite, just dilute with water in a squirty bottle n a stiff brush, just can't mix it too strong or the Ally goes white. Look forward to the video
And I would be pullin the carby n stripping it, that doesn't look nice that dirt runnin down the back of the slide. Ya got dirt n water comin in thru the top by the looks