my friend got a CBR1000rr 2005 , today why bay a new battery but the alternator not give enough voltage i run the bike for 5-7000 rpm. but the supply voltage is 13,5 ,minimum request is 13,8 -14,2 .Where i look end what can I do to repair the problem .Thanking you in advance

 

The 2005s had stator problems and Honda extended the warranty on them but the time may be up on that. I'd call a dealer and ask before I did anything.