Join Date: May 2011
Location: HOCKEYTOWN ® MI
Check your fuses (obviously) first.
Might as well get that new battery since you said the old one was on its last leg (the current one probably won't hold a charge after being drained - or get it bench tested to verify before spending money on the battery if you want to doublecheck).
Then, proceed to check the voltage the bike puts out while running with your multimeter (the exact steps are listed in the shop manual) to see if it's within normal charging limits.
-'11 Graphite Black CBR 1000RR (sold)
-'02 Silver & Black CBR 954RR
-'06 Black/Metallic Gray RC-51
-'08 Pearl Orange CBR 600RR (sold)