Question about 1993 Yamaha XTZ 750 Super T?n?r?

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Yamaha Super Tenere xtz750 misfires

Yamaha super tenere xtz750-RPM not stable after riding for 2to3 km with occasional misfire(jerking).Bike is a 1993 model.

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  • Yamaha Master
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Hi, Tee4fam and the usual suspects are:
1. 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.
2. 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.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor damaged, contaminated, sticky float, plugged jets.
13. Multiple carburetors out of sync.
14. Fuel filter clogged.
15. Old or contaminated fuel.
16. Fuel tank vent system plugged or carb vent line closed off.
17. Gas cap diaphragm valve faulty.
18. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
19. Carburetor controls misadjusted.
20. Incorrect valve timing.
21. Valve springs floating, weak, or broken.
22. Damaged intake or exhaust valve.
23. Incompatible performance parts.
24. Control module may be in "LIMP" mode
25. 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.
http://www.super-tenere.net/forum/xtz750-power/25293-misfire
http://www.yamahasupertenere.com/index.php?topic=13240.0
Yamaha Super Tenere XTZ750 Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xt-owners-manuals

Posted on Jun 07, 2017

5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: Bad Vibrations

Obviously, harmonics are at play here. I suggest you change gearbox oil and filter then change the oil again (w/o filter) after 50 miles. The idea is to flush dirt and grit from the engine. Try the bike now. Some would say this is a long shot but it is cheap and not much hassle > and it may well work. If nothing else, it cant't hurt anything. Change to premium gas to eliminate pre-ignition.

If the vibration is still present you had best take the bike to the dealer for his first hand input. Broken clutch friction plate? Bearing going bad? Connecting rod going bad? If I had to wager I would go with the clutch. I am reaching here. Not much more I can do.

Cape Cod Bob, What are your thoughts?

Posted on Apr 16, 2009

  • 200 Answers

SOURCE: Yamaha Fazer 600 - keeps breaking against me when riding

I suspect poor fuel delivery or starvation. At those rpms your bike requires a lot of fuel.Replace any and all fuel filters, check fuel lines for any kinks. Drain tank (petcock on pri ) then remove and clean petcock , replace. Run a bottle of techroline thru your next couple tanks of gas....Good Luck to you my friend...Tim

Posted on May 10, 2009

  • 850 Answers

SOURCE: The battery on my 1995 Yamaha Virago 250cc is not working

starter brushes could be worn out or a dirty or loose connection!
Starter button may need checking also the solenoid
week compressin or leaking diaphrams in carbs will cause it too
I suggest you charge battery & start at the button & work your way back

Posted on Jul 17, 2009

  • 8909 Answers

SOURCE: I own a 2009 Yamaha

It could be all sorts of problems that give you this error.
I would suspect the regulator as the altenator vary rarely is at fault unless it is burnt out. Also check for a faulty battery or chafed wiring.

Posted on Dec 23, 2010

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Hi, Anonymous and the usual suspects are:
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Discharged battery, needs to be 12.5 volts or better and be able to pass a load test if necessary.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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YAMAHA SUPER TENERE XT1200Z Owner Manual
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https://www.manualslib.com/manual/1067678/Yamaha-Xt1200z-2010.html

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