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Yamaha X-1R charging issue

Change my battery 3 times already, even my rectifyer, everyone is telling me it's a magnetic coil problem, every day I go to work I must push start it and can not close the throttle because if I do the engine stalls, my battery is totally flat. Recently while I was ridding I went over a hard object on a road suddenly the lights all came on, my headlight was so bright my horn was loud and the signal lights were all working good, after 5 mins everything is dead, can anyone help me here, I'm riding an x1r

Posted by Anonymous on


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  • Yamaha Master
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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.
Thread Group SBF Yamaha 1r 135
Yamaha T135SE Service Manual
OEM parts for Yamaha
YAMAHA T135 SE Owner Manual

Btw, I’m available to help over the phone in case u need at

Posted on Jan 08, 2017


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
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Posted on Jan 02, 2017


SOURCE: Self Starter problem with Karizma R (Sep 2007)

Check the fuses too and basically all the wiring, there could be somewhere a loose connection also check the wires at the solenoid switch.

Posted on Apr 21, 2009

SOURCE: new battery, fully charged, motorcycle runs until

Check the charging rate of your bike ,it seems there is a problem to it.

Posted on Aug 02, 2009

  • 43 Answers


lights on motorcycles are not like scooters, they run off the battery. In the old days they had a separate switch, now they turn on immediately after ignition key is on.

Posted on Dec 31, 2009

  • 1140 Answers

SOURCE: Rode my motorcycle about 50

doesn't sound like it with bright headlamp. what about your kill switch? my kill switch wire broke while riding, did same thing.

Posted on May 20, 2011

  • 1508 Answers

SOURCE: bike has new battery and

You should start by checking if its charging.
put a volt meter across the battery, it should read roughly 12v
then start the bike and it should rise to 14v
much more than this can blow bulbs and boil batteries

Posted on Aug 15, 2011

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