Question about 1986 Yamaha FJ 1100

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Bike turns over but wont start tried new coils i think it is the ecu but not sure. my bike is a fj1200 abs model.

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  • Yamaha Master
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Hi, William and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the enrichner.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. Fuel injectors stuck open.
13. 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 cursory 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.
14. 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.
15. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
16. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections loose, or connected to the wrong cylinders.
17. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
18. Faulty neutral, clutch lever, or kickstand safety switch.
19. Faulty fuel pump or fuse or relay.
20. A stuck bent or burnt valve.
21. Tilt sensor needs a reset.
22. Security system not disarming alarm needs a reset.
23. Check for engine trouble codes.
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.
Electrical Bike won start 86
What Do Check When My Motorcycle Won Start Honda Shadow Forums Shadow... very comprehensive
Yamaha FJ1200 1984 1993 Workshop Service Repair Manual Download Manuals... $10
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-fj-owners-manuals

Posted on Jun 09, 2017

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Posted on Jan 02, 2017

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chad22711
  • 3 Answers

SOURCE: 1989 FJ1200 no power at take off

Have u ever tried SEAFOAM?

Posted on Jul 10, 2012

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Not sure what bike you have. I ran into a similar problem with several small engines and the CDI box was the culprit. Replacing with a new coil seemed to fix the problem but it would come back when the box cooled down. You may also try looking for chewed wires on your ECU. Look very closely for any missing insulation on the wire. You may also want to double check the connections to the coil to make sure they are snug.

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Have u ever tried SEAFOAM?

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Hi, Alison_stath the answer to this question is way above my pay grade and for this situation, I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry.
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.
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It starts up good then in app. one min. the


sounds like ABS module fault
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