Starter motor problem

hi there 12.8 volts may be a bit low should be over that so try charging the battery ,if this does not work put the bike into gear with ignition off and rock back and forward and see if it turns the engine ,but at the momment charge the battery i think you will get it started cheers

How old is the battery? You need to check if the alternator is putting out a charge, is the regulator working. A dead cell in the battery will often show a full charge state if you try to charge it. When you try to start the bike the battery is required to give a high charge to the starter. The buzzing you hear is probably the starter solenoid trying to work. I would suggest fit a new battery and if the bike starts OK check out the charging system. 14.4 volts is the normal reading across the battery with the engine running at 5K.

Your regulator may have went bad. The regulator converts the ac charge produced from the alternator into the DC volts required to charge the battery. When they fail they can put out 5 times what the battery needs. Depending on your bike the regulator may be separate from the alternator. You should pick up a cheap volt meter. Once you get the bike running, use the volt meter to see what the bike is charging at. If you find the charge is above 14.8 V or that the voltage fluctuates to the extreme, ex. 14.2v, 8.2v, 12.7v all within a few seconds. then the regulator is probable. Another problem I have found is that the ground wire for wiring harness does not get hooked back up. This is a smaller ground wire that may plug into the main ground cable or sometimes is a separate lead connected to the battery. This will fry an entire system.

The battery IS DEAD. The buzzer is the starter solenoid not getting enough juice to close the contact inside itself. Check your battery connections and make sure they are TIGHT, charge the battery and see if it helps, if not - you need another battery or a shop to help diagnose the bike.

Could be a faulty starter motor. I would check the power to the motor when you try to start it.
Hope that helps.

Hi, Steven before testing any electrical component in the Starter System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead acid batteries.
A motorcycle starter relay is an electronic mechanical switch that has a small coil winding around a piece of metal that requires low amperage and thin wires to be activated. When you turn on your ignition switch power 12 volts is sent to the relay coil which in turn becomes a magnetic contact point that pulls a spring-loaded contact point to itself completing an electrical circuit that allows more amperage necessary to be accessed by the starter solenoid which in turn acts in the same way as the relay but on a larger scale with its stronger heavier contacts making available the necessary amperage to turn the starter motor. If your battery has low voltage it, in turn, makes the magnetic contact point weak in trying to pull its counterpart to make a connection. These relays are usually encased in a plastic housing that may or may not be sealed depending on the quality of the product. When activated they will produce a small amount of heat to their metal components which in turn can create the perfect environment for condensation to form depending on weather conditions and how careless you may be with a water hose or sprayer while washing your bike. After a period of time, several months to several years depending on the circumstances this condensation is the starter button for electrolysis and the slow build up of corrosion which ends by preventing the magnetic contacts in making a solid connection and alerts you to this situation with the customary greeting "CLICK or BUZZ". The relay is inexpensive and needs to be replaced however in a pinch they can be forcibly opened cleaned and resealed with silicone. In a nutshell, motorcycle starter relays take in low amperage and send out higher amperage when activated and for curious minds, the voltage remains constant at whatever your battery reads at the time.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Main relay buzzing CEL Flickering WTF Honda Tech Honda Forum Discussion
http://www.apriliaforum.com/forums/showthread.php?217303-Buzzing-starter-relay-bike-won-t-start-Relay-and-battery-are-ok-though
Honda CBR125R Owner Manual service
http://www.partsfish.com/page/oem-parts-for-honda
Honda CBR125RW Owner Manual

check your battery it could be low it's under the rider seat. you want a nice 12 volt, if you can run the battery to your bike shop or parts store ask them to load test what this is, is the process of putting demand on a system or device and measuring its response. if it does not pass the battery will can still power the light but not start the bike. Now if it is dead then you need to fix the problem that caused the dead battery, after you get the battery charged or replaced start you bike and check your chargeing system. you should read 14.50 +/- .50 when you rev the bike. also while you are in there make sure the ground is good.
Good luck
Mark
C.C. Motorsports

Could be a battery problem. The smell may well have been the battery over charging. The voltage regulator would have to be suspect if this is the case.

Hi and welcome to FixYa,

Initially, have the battery externally charged and checked / load tested.  The buzzing indicates that the relay is turning on & off in a continous cycle hence the buzzing sound. Possible causes could be a weak battery or a loose ground connection of the starter relay through the diodes, a faulty starter switch or a faulty starter motor.  To determine which:

• when starting again, short the 2 big terminals of the starter relay but expect a big spark;
  
• if the starter motor spins, then possibly the diodes and/or the start button switch would need checking;
  
• if the starter motor does not turn, then the starter motor would need looking into more particularly the carbon brushes and/or the commutator segments.
  

Incidentally, have you tried bump starting the bike?

Good luck and thank you for asking FixYa.

I'm having starting problems with my MOTO 6.5 ther is a 'buzzing' noise when the start button is pressed(the bike will not start or even try to fire) is it the solenoid? The buzzing noise is coming from the small item near the battery is this the solenoid? The battery is almost new so i know this isn't the problem. can anyone help? Sounds like a problem with the starter motor. Are you sure that the motor/piston is actually moved by the starter motor? If notthe buzzing noise is from the starter motor itself that runs 'free' without engaging the magnet that connects with the motor. The magnets can get 'sticky' and sometimes helped with a Careful hammering onto the starter motor. In any event you will need to rebuild or replace the starter motor unit. This all assumes that the moto still starts whenyou push her in second gear, right? Hope this helps and good luck. ,,,