Normal
I only look for grey or white plugs.Certain brands of oil will leave a plug black and shiny (belray mc1) and others will leave it look sooty (Yamalube) that doesn't mean it's running rich. To properly gauge a bikes burn you need to do a plug chop and read the band at the insulator base on the inside.
I only look for grey or white plugs.
Certain brands of oil will leave a plug black and shiny (belray mc1) and others will leave it look sooty (Yamalube) that doesn't mean it's running rich. To properly gauge a bikes burn you need to do a plug chop and read the band at the insulator base on the inside.