Originally Posted by
j4k3
Well I just got it and the plug was dark as fuck. I'm assuming it's running very rich due to that. I understand the bike can bog down due to excessive fuel but as it sits now I'm running no filter (lots of air) and it still bogs. The jet looks damn near clogged because of the damage too. It's just all Chinese to me at the moment because it's so new to me. I'm doing a lot of reading and research.
well the plug is probably dark because it's been run for a while.
you have to take a reading from a clean plug.
get some new plugs. NGK for the win.
Champions are easier to read but the NGK's will perform better
You can take a plug reading at wide open throttle. Accelerate over a long distance (preferably uphill) getting into final gear and keeping throttle fully open. When fully tapped out, grab the clutch and hit the kill switch. The motor should stop immediately, then look at the plug. Should be tan, but not too dark.