Join Date: Sep 2016
Location: Northern Virginia
2 possibilities come to mind
1) a loose/bad/corroded connection stealing voltage
2) insufficient charging circuit voltage.
a) put a voltmeter on your battery while the bike is off, on but not running, idling, and when you give it come throttle.
b) disconnect the negative terminal from the battery and measure the voltage on the battery and on the wires while the bike is idling, and when you give it a bit of throttle.
c) use a voltmeter on the headlamp plug (BLU=highbeam, WHT=lowbeam, GRN=ground) while on but not running, idling, and while giving it some throttle.
let us know what you find and we will try to make good guesses as to where the problem is.
2009 Honda Rebel 250
"The bravest thing for me to do is admit when I am wrong" - unknown
HRF Answer #1 You should take the MSF Rider Course
HRF Answer #2 You need to clean your carburetor
HRF Answer #3 Sorry we assumed if you didn't say otherwise