I got this and it was sitting for 5 years. So I cleaned the carbs and removed the gas. It fired right up. The next day I went to ride it and it bogs right down around quarter throttle so I tore the carb back apart and cleaned it. It keeps bogging down at quarter throttle but idles fine can't seem to find the problem any idea?[/B]

 

After setting 5 years cleaning a carb alone may not help. Rebuild it.1999 2004 Honda TRX400EX Carb Carburetor Repair Kit Made in Japan 400EX 03 044 | eBay

 

I got a 2004 trx400ex I redone the sprockets and chain installed a new battery after frying one and now the kill switch doesn't work bike will start up and idle till I hit a toggle switch for the led light I installed for a headlight or turn on the fan and it kills it out HELP