Question about 1993 Yamaha XTZ 750 Super T?n?r?
Yamaha super tenere xtz750-RPM not stable after riding for 2to3 km with occasional misfire(jerking).Bike is a 1993 model.
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.
Yamaha Super Tenere XTZ750 Service Manual
OEM parts for Yamaha
Posted on Jun 07, 2017
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Posted on Jan 02, 2017
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
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
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
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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