Question about 1985 Yamaha FZ 750 FM (Japan)

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Backfiring Ive got a yamaha FZ 750 FM that has a back fire on one side. It usually happens when I let off the throttle, and before I break, when the engine is slowing down. Any suggestions.

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TRY DIFFERENT JETTING IN THE CARB I LIVE IN THE MOUNTIANS AND I FIND THAT THE ENGINE RUNS TO RICH CAUSE OF THE HIGH ELAVATION

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Sounds like fuel is still entering one cylinder after releasing the throttle. Time to have your carbs cleaned as well as synchronized. Good Luck!!!

Posted on Nov 10, 2008

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1 Answer

Fzx 750 is sputtering when throttle opened. Acceleration slow.


Hi, Jim and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Intake system air leak.
4. Vacuum piston malfunction.
5. Pinholes or torn diaphragm.
6. Accelerator pump leaking or no output.
7. Plugged bowl vent or overflow.
8. Fuel level in bowl too low.
9. Restricted fuel supply passages.
10. Plugged jets or passages.
11. Worn or damaged needle or needle jet.
12. The enrichner valve/choke not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.starbikeforums.com/forums/49-v-star/9084-v-star-acting-very-sluggish-sputtering.html
sputtering upon acceleration electrical or fuel
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Yamaha FZ FZX750 Service Manual 1986 1987 Download Manuals Technical $10
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals

Aug 04, 2017 | 1993 Yamaha FZX 750

1 Answer

Engine torque specs 1985 fz 750


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $10 you can download another one. 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.
http://www.edubs.net/bikestuff/sv650/sv650TorqueSpecs.pdf
Yamaha FZ 750
1985 1988 YAMAHA Genesis FZ750 Service Manual Repair Manuals AND Owners...
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals

May 17, 2014 | 1985 Yamaha FZ 750 FM (Japan)

1 Answer

1983 FZ 750 high idle


Hi, Stevemagney and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
10. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links blue below. Good luck and have a wonderful day.
FZ750 Super High Idle Problem
carb high idle problem
1985 1988 YAMAHA Genesis FZ750 Service Manual Repair Manuals AND Owners... $10 cheap
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals

Mar 25, 2011 | 1986 Yamaha FZ 750 FM (Japan)

1 Answer

Why does my Yamaha Fazer 750 1986 revs high on idle when warm


Hi, Rayevans2006 and the usual suspects are:
1. Throttle cables improperly adjusted, pinched or need lubrication.
2. Idle adjusting screw needs to be backed off.
4. Air fuel mixture adjusted too lean start with 2 full turns.
5. Intake system air leak.
6. Fast idle choke ramp is not releasing.
7. Broken throttle return spring.
8. Damaged diaphragm or slide.
9. Faulty MAP, TPS, ATS, O2, sensors or wiring/connector
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.
FZ600S high idle issue
High idle when warm 1977 Yamaha xs750
YAMAHA FZ700 FZ750 FZX700 FAZER SHOP MANUAL 1985 1988 Download Manuals... $10
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-fz-owners-manuals

Aug 08, 2010 | 1986 Yamaha FZ 750 FM (Japan)

1 Answer

I have a yamaha dirt bike that someone stole and


Check the igniter. Go back to the dealer and ask him to see one. Then go back and find it on your bike. Yamaha's usually have them under the seat, or left side. But I don't know exactly what year you have. Run the VIN on the frame under my tips and tricks is a web site that'll break it down for you.

Mar 14, 2010 | 1986 Yamaha FZ 750 AE (U.S.)

1 Answer

Wont idle


lol buddy if its not idling turn the idle screw in until it idles get back to me if no difference 2ee8c57.jpg

Sep 30, 2009 | 1986 Yamaha FZ 750 FM (Japan)

1 Answer

Not runing


switch plug wires and see if the dead cylinder starts firing --if it does you need new wires

Nov 10, 2008 | 1985 Yamaha FZ 750 FN (Europe)

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