Question about 2002 Yamaha V-Max
Hi, John_mvc and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 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 batteries fail in this scenario more so than lead acid batteries.
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. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
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.
Running on 3 cylinders help VMaxForum net
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
YAMAHA VMX12 Owner Manual
Posted on Jun 12, 2017
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Posted on Jan 02, 2017
I had a similar problem with my Hinda Cb750 after it sat for years. What i had to do was work my way from the battery thru the electrical system cleaning all the connections along the way to the coils This fixed the problem and get me firing on all cylinders. give it a try
Posted on Jun 28, 2009
SOURCE: Starting problems
Hi and welcome to FixYa,
A way to verify start the bike from the cold. Note which exhaust will not heat up after the start (carefully). If the exhaust not heating would be from either cylinders 1 & 4 or 2 & 3, then it would be an electrical/ignition problem. If on the other hand what will not heat up will be the exhaust of 1 & 2 or 3 & 4, then it would be a carb/fuel problem.
Alternately, removed all the sparkplugs, reconnect to the cap and lay on metal part, start the bike. Note for absence or presence of spark on plug ends.
Good luck and thank you for asking FixYa.
Posted on Jun 28, 2009
u can do trial & error method by connecting and then starting and figureing which cylinders not firing or u can buy a manual for yama on line or @borders
Posted on Aug 07, 2009
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