Question about 1985 Yamaha XJ 700 S Maxim

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1985 Yamaha Maxim XJ700 battery drain

I have a '85 Yamaha Maxim XJ700 that has a problem with the battery draining. Everything else works great! He has had the regulator and the generator brushes replaced last week, but something is still draining the battery. The battery might last 24 hours on a full charge. The battery is also new. Does anyone know what could be draining the battery and if so, how can I check to see if that is the problem? Thanks in advance:) Additional Details I don't know if this matters at all, but the previous owner placed an aftermarket lighter on the bike and connected the wires to the headlight. I took it off yesterday thinking it might be the cause of the problem, but the battery is still dying.

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  • bazzz7071
    bazzz7071 May 30, 2010

    Hello, have you actually checked the charging system? I see no mention of it.

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  • Yamaha Master
  • 39,945 Answers

Hi, Jp_richar82 perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12.5 volts or better after charging and it must be able to pass a proper "LOAD" test you may have cursory readings of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries have this issue more so than lead acid types.
3. Check battery terminals for damage or corrosion, check the 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.
4. Hook up battery positive cable, then with your multimeter on the milliamp scale connect one lead to the negative battery post and the other lead to the ground cable. The meter should read 3 milliamps or less, 10 milliamps with a radio, 15 milliamps with radio and CB. If your multimeter reads higher you need to isolate the circuit by pulling fuses and circuit breakers one at a time and observe multimeter for a drop in amperage then get out your test light and track down the short in that circuit.
5. Hook up the multimeter to the battery set it to DC volts and start the engine if multimeter falls below 9.0 volts while cranking you need to perform a proper load test on the battery and replace if necessary.
6. With the engine running at 3600 RPM, the battery should read 14.3-14.7 volts if not continue tests.
7. Unplug the voltage regulator from the alternator at crankcase by the front of the primary cover.
8. To test voltage regulator go to https://www.youtube.com/watch?v=F8EjV0IjW9Q
9. With the multimeter set to the ohms scale, with one lead grounded, touch an alternator pin ohmmeter should read infinity, if not replace the stator.
10. With both leads touching alternator pins, multimeter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace the stator.
11. With the multimeter set on AC volts scale, both leads touching alternator pins multimeter should read 16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace the rotor.
12. Check for excessive wattage load from headlight
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.
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.
http://www.motorcyclesurvey.com/reviews/yamaha/xj700_maxim_x/r543/comments/page-3
Electrical Battery Issues 1985 xj700
Yamaha XJ700N Service Manual
OEM Parts for Kawasaki
http://mybikemanuals.com/yamaha/yamaha-xj-owners-manuals

Posted on Jun 07, 2017

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

rockitman187
  • 2559 Answers

SOURCE: My bike has a rough idle and sometimes backfires.

Check the timing,If it is set right,your carb is running lean.


Please rate this a fixya.

Posted on Feb 14, 2009

SOURCE: 1985 Yamaha XJ700 Maxim won't work

All engines need the same three to four things to work correctly..
Compression, Fuel, Spark, (timing).... But, usually those bikes, have fuel issues. The fuel tank spigot has a vacuum controlled valve which when the engine is cranked, suction is applied and fuel then can flow. Second,, the needle and float in the carb tend to get gummed up along with the main and idle jet... You need to make sure the carb is maticulously clean, Using carb cleaner, and tag wire,, or a piece of fine wire ( be careful not to enlarge the tiny holes). Keep refering to the 3-4 list fuel, compression, Spark,,,timing.....
Good luck...!!
Rib

Posted on Mar 12, 2009

  • 1 Answer

SOURCE: Is there a wiring diagram for a 1985 Yamaha Maxim

I can't find an owners manual for my 85 XJ700 I just purchased. Anyone know where to go?

Posted on Jun 15, 2009

  • 8 Answers

SOURCE: 1985 Yamaha xj700 Maxim- Carb. fuel lines

yes, the breather line hooks to the petcock on the line facing the back, the fuel line hooks to the larger one. the line from the breather is actually a vacume line that turns on the fuel, without it you will not get fuel out of the petcock unless it is in the prime position.

Posted on Jul 04, 2009

SOURCE: 1985 Yamaha Maxim XJ700 not starting

It seems the float chamber of the carbs are not getting enough fuel (gas).
Try to check this first by opening the carburator float chamber drain screws....thn select the petcock to 'prime' positon and see if theres fuel running out of those drain screws freely.If not thn it time to clean the carbs.
Not bad too to remove the spark plugs and clean them and regap.
Hope this helps!

Posted on Jul 13, 2009

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Hi, Sevensons7 always check fuel flow first to isolate the problem area otherwise the usual suspects are:
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5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
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10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
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Careful with the model number, the XJ700 and the XJ700X are entirely different bikes.

By the way, if you want more answers about your Maxim-X, feel free to visit the "Maximum Maxim-X" web site at www.maxim-x.com and the lesser known FTP site for the Maximum Maxim-X web site at www.maxim-x.com/pix

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It seems the float chamber of the carbs are not getting enough fuel (gas).
Try to check this first by opening the carburator float chamber drain screws....thn select the petcock to 'prime' positon and see if theres fuel running out of those drain screws freely.If not thn it time to clean the carbs.
Not bad too to remove the spark plugs and clean them and regap.
Hope this helps!

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