2smoker

Hey all, sorry to post such a negative comment as i'm a newbie, but my TZR is really grinding my gears. recently bought this bike and was over the moon, soon as i started hit that power band i've had a huge grin on my face. problem is every day i'm changing the plug!! it always comes out with a thick black residue on?!? I've been advised it is getting to much oil? how do i restrict the flow? even consider taken pump off and premixing?? appreciate all advise.