Hi guys, some of you may have seen my previous posts about my headlights cutting out while riding. Well i didnt get much replies from anyone on this issue. After searching through google. I have found that my r/r maybe at fault. Got my multimeter out and tested/ inspected the curcuits. At idle speed the voltage measured at 13.5. I pulled the throttle to 5/6000 rpm an noticed the voltage drop to around 3-4 volts for a couple of seconds then it went back up to around 13.5 im assuming that this is when my lights cut out and then back on again. When i turned off the power it measured at 12v with the engine switched off. Is this normal? Please help, i do not have any biker friends and i am a learner on a cbr126rw its a 2007 model with on 3500 miles clocked up. I woulnt expect essential components to go wrong with such low mileage.

Ps i have checked all connectors and any visible wiring which all looks in good condition.

Thanks.

 

Check out these links, they'll give you a good over-view of the electrical/charging systems...

Technical Resources - Resources for Electrical Systems on Motorcycles and ATVs - ElectroSport

Charging System Diagnostics - Rectifier/Regulator Upgrade - Triumph Forum: Triumph Rat Motorcycle Forums

Hope this helps, Ern

 

Thanks Ern. i'll check them out.

 

The voltage shouldnt drop. That indicates a problem with your charging system. Try charging your battery. The 12v you measured is undercharged. Not that this will fix anything. But, it is good practice to maintain your battery. It should be higher when its fully charged. It does sound like the r/r though. And I think I've read that the honda r/r's are not that good. I would get a wiring schematic for your bike. There might be something you missed. Then go through each individual wire (again) . Do you know how to test your r/r? Just do a search. There are some tests you can do to check it. You already have the multimeter.

 

the voltage drop would make me think it's the r/r, but you voltage at bike off and idle should be higher (but a low battery charge wouldn't cause that voltage drop). follow those links like ern provided

 

could your regulator be over regulating?