Question about Yamaha XS 650 A Motorcycles

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1997 yamaha wave runner 650 missing when you throttle spark plugs good rebuilt carb fuel tank cleaned out. could this be stater problem

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Have you tried to richen up the low speed on the carb?

Posted on Aug 20, 2010

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Fuel pump location on a 1998 yamaha wave runner xlt 760


'Fuel pump' -> Uses the diaphram within the carb. Rebuild / get new gaskets for carb.

Jun 29, 2017 | Yamaha Motorcycles

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I have a 92 yamaha 350 warrior rebuilt the carb new stater and pick up coil I have it in time and plenty of spark and compression but still wont start.....


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does it have spark at plugs ? carb clean and fuel new ?

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CYLINDER SOUNDS LIKE CUTTING IN ONCE AND A WHILE MAKING POWER CUT IN AND OUT ON A 2000 YAMAMA 650 V STAR CLASSIC HAVE ALREADY CLEANED CARBS


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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, carburetor and/or filter.
12. Old dead or bad fuel.
13. Fuel tank vent system plugged or carburetor vent line closed off.
14. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
15. Carburetor controls misadjusted.
16. Damaged carburetor.
17. Incorrect valve timing.
18. Weak or broken valve springs.
19. Damaged intake or exhaust valve.
20. Check for engine trouble codes
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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Oct 31, 2013 | Yamaha V Star Classic 650 Motorcycles

1 Answer

If I remove a yics plug from one side and prime with fuel, the engine will start and idle until prime is burnt. Why will fuel not flow. New tank, new peacock, rebuilt carbs, new gas


Hi, Burns193 always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
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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Apr 20, 2013 | 1982 Yamaha XJ 650

1 Answer

My yamaha vstar 650 2004 custom is having trouble with accelerating, the throttle feels real tight and i have to force it back to get more speed and it dont sound to weel whe i force it, it can get up to...


Hi, Moe_r_785 and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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. Fuel filter clogged.
14. Old or contaminated fuel.
15. Fuel tank vent system plugged or carb vent line closed off.
16. Gas cap diaphragm valve faulty.
17. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
18. Carburetor controls misadjusted.
19. Incorrect valve timing.
20. Valve springs floating, weak, or broken.
21. Damaged intake or exhaust valve.
22. Incompatible performance parts.
23. You may be in limp mode.
23. Check for engine trouble codes.
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.
http://www.beginnerbikers.org/showthread.php?28259-09-V-Star-650-Custom-acceleration-problems
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Oct 10, 2012 | Yamaha V Star Classic 650 Motorcycles

1 Answer

99 yamaha vstar 650 clasic no power when acelerating i cleaned carb


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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.
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. Intake air leak.
10. Water, dirt, or rust in the fuel system, carburetor and/or filter.
11. Fuel tank vent system plugged or carburetor vent line closed off.
12. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
13. Carburetor controls misadjusted.
14. Damaged carburetor.
15. Incorrect valve timing.
16. Weak or broken valve springs.
17. Damaged intake or exhaust valve.
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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98 00 Yamaha XV650 Star Service Manual XVS650 Moto Data Project
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http://www.starmotorcycles.com/assets/service/manuals/2003/LIT-11626-16-05_22.pdf

Jul 15, 2012 | 1999 Yamaha V Star Classic

1 Answer

The bike has sat for a few years. have had the carbs cleaned and rebuilt. I've drained and cleaned the fuel tank. The bike cranks and cranks but will not start. It is not firing at all. Seems like no...


clean the points as well, they may have got muck on them? or even stuck up? how good is the battery?,,, it may crank the bike over but how much power is left for the spark plugs to fire up on? i take it there is petrol getting to the carbs? try this out take a good plug stick a plug lead on it hold it down hard on the head of the bike and spin the motor up, if you got a spark you will see and hear it,,,ps,,get your mate to do the holding down bit (he, he, he,?????)

Oct 24, 2009 | 1982 Yamaha XJ 650

1 Answer

1982 XJ 650 maxim cylinder 2 & 4 won't run


Are you saying that 2 & 4 got gas with external tank but not with gas tank? If so something else has happened ,if gas is getting to the carb it cannot by-pass 2 to get to 1. Take the tank back off ,connect to external, again. See what happens.

Sep 11, 2009 | 1982 Yamaha XJ 650

1 Answer

Starting problems


carbs have you taken them apart and rebuilt them at the most after sitting so long the fuel drys up if there is none in there or if there is fuel in it then it has turned to varnish just drain the system clean the tank clean the carbs and try it again

May 04, 2009 | 1981 Yamaha XJ 650

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