hi at all,[/align]i am italian and speak bad english and so sorry me please.[/align]i have a cbr 600f4 1999 and i have a problem under 3000 rpm if fan/lights are on; the motorbike is not fluid and can stop it at the start.[/align]i hope u cna undestand the problem i have.[/align][/align]i have done those works but they where unseful.[/align]-changed spark(i have used both normal and iridium spark)[/align]-changed air filter[/align]-clear and syncronizate carburator[/align]-changed motor oil[/align][/align][/align]when the motorbike is cool and have lights on off the problem is very low and so i think is a energy problem.[/align]do u know this on my motorbike model?[/align]thanks you to your important help.[/align][/align]

 

I don't know if I can solve this but if it is electrical, did you check the stator (alternator)? I think this is the one that charges the battery. Also, make sure that the battery is good. I thought I read somewhere you still need the battery to be good even when running.

Dennis