Hi, Anonymous the systems check below is geared towards Harley Davidson so exact numbers might differ slightly with book specs on your bike but the basic principal is the same, in order to check out any main electrical system, you have to start with a fully charged battery 12.5 volts or better, and be able to pass a load test if necessary. "WARNING" never plug or unplug any electrical connector with the engine running !!!
1. Check battery terminals for damage or corrosion, check battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
2. Check the voltage drop at the battery when you hit the starter button, anything below 9 volts you might have a faulty battery.
3. Check voltage at the battery with the bike running at 3,600 RPM should be 14.3 to 14.7 volts. If you are not getting these numbers, you might have a faulty voltage regulator.
4. Make sure voltage regulator is "GROUNDED" and functioning properly, watch the video below on how to test a voltage regulator.
5. Unplug the connector to the alternator and hook your multimeter leads to the alternator (pin/socket selection does not matter) set the multimeter to AC volts, at an idle the multimeter should read 16 to 20 volts AC. at 2,000 RPM 32 to 40 AC volts, 3,000 RPM 48 to 60 AC volts. If you are not getting these numbers, you may have a faulty alternator rotor.
6. Set the multimeter to OHM'S, connect one lead to the alternator (any pin/socket) and the other to a ground, the multimeter should read infinity. Connect both leads to the alternator multimeter should read 0.1 to 0.2 OHM'S. If you are not getting these numbers, you have a bad stator.
7. Check all wiring in the charging circuit for worn or chaffed spots and all wiring connectors in the circuit for corroded, broken, or loose pins/sockets, which is the # 1 offender.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day. Charging 101 for Yamaha Road Stars Stock motorcycle regulator rectifier check out Yamaha XV1700P Service Manual OEM parts for Yamaha Yamaha Star XV17PCX Owner Manual
Hi Dickduchemin, I am sorry you can't find the first and best tool you ever bought for your Yamaha but despair not for a mere $15.00 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day. 2006 Yamaha Motorcycle Service Repair Manuals
several reasons , it could a cheap bulb or the back or inside of
bulb holder itself has a lot of corrosion, or it is lose in the socket
and if that is the case it will shorten the life of the bulb, also you
should never touch the bulb with your bare hands or use a oil soaked rag . becareful when you change it any oil from your fingers
will shorten the life. if you have extra power going to the bulb will
shorten the life, check your voltage coming in to the socket . check
with just the key on and when it is running, compare your readings.
Sounds like jetting is to rich, recheck settings and fuel height settings, need to get the fuel mixture correct as that bike will develop other running issues due to carbon build up in the rear cylinder. check out www.roadstarclinic.com as this is a good source for information on this bike