Just bought this bike and it runs awesome but anything over about 5000rpm and the bike starts to miss and foul out. Any ideas of what could be causing this?
Edit: the bike has just had new NGK spark plugs installed.
Problem: Main fuse blows immediately when the ignition is turned to "ON."
Background: The headlamp relay stopped working, so I replaced it with an ON/OFF switch. I connected the black and yellow wire in the relay plug, and added the switch between the blue/black and the red/yellow wires...