Just tool my tank off and there's about 4 or plugs with wires , I notice the one wire right on the left with is yellow and runs down the frame into the fly wheel is all burnt out and one wire has completely came off ? They bike has still been running fine ? Any ideas ? Thanks

Yellow sounds like a stator wire. I'd be checking the charging system before you go out more than a few miles from home.

There should be three of those yellow wires, they come from the stator / generator.

Sounds like the bike has suffered classic reg/rec / generator / battery failure.

Replace broken wires / generator if it doesnt pass the tests, check the reg/rec output and make sure the battery is new / good.

the battery is band new,
the wire has broke right by the plug so i cut and block conector or some think, thanks :)