Question about 2004 Yamaha V Star Classic

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2004 yamaha v star backfiring, and not hitting one cylinder at all. any ideas?

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Posted on Jul 22, 2009

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My 2001 yamaha 1600 roadstar backfires and cuts out just before I shift. It idle fines. it runs good between gears. It cuts out just when it get up in higher rpms, just before I shift.


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. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage check for spark leakage in the dark.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
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.
Re Backfire Popping Sputtering HELP Road Star Forum Yamaha Road Star
2002 Yamaha Road Star Silverado 1600 backfiring Fixxit
Yamaha ROAD STAR XV16A Owner Manual
OEM parts for Yamaha
Yamaha XV16AL Service Manual

Apr 20, 2014 | 2003 Yamaha Road Star Warrior

1 Answer

SPORTSTER WITH POINTS


make sure the points are very clean and gap is set correctly ! is the timing dwell set ? remove one coil and try it on other cyl and see if it now sparks , if yes then replace other coil , are the 2 sets of points or one ? have you checked condencers ok ?

Dec 09, 2013 | 2004 Yamaha V Star Classic

1 Answer

Front cylinder backfire


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. Faulty main circuit breaker and or connections.
4. Faulty ignition coil and or connections.
5. Faulty spark plug, oil or gas fouled, wrong heat range or service type, wrong gap, loose in the cylinder head, broken electrode or insulator.
6. Faulty spark plug cables, leaking or broken, internal damage.
7. Faulty ignition module, switch, CKP, MAP, CMP, sensor and or any connector in the ignition circuit could have corroded, loose, or broken pins/sockets
8. Burnt exhaust valve or air leak in the exhaust system.
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.
Combustion issues in the front cylinder in 1100 Star Tech Forum
http://www.starbikeforums.com/forums/49-v-star/28593-vstar-1100-backfiring-one-cylinder.html
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2000/LIT-11626-13-36_96.pdf

Jun 14, 2012 | 2004 Yamaha V Star 1100 Classic

1 Answer

A kuryakin hyper-charger installed on a 2004 Yamaha V-star 1100 custom. has tendency to back-fire a lot whenever i let off the gas.


Hi, Patwhite64
COUGHING is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals.
POPPING or backfiring on deceleration is usually caused by a lean fuel condition or an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and torquing the exhaust clamp to the proper spec.
SPITTING is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw is adjusted too lean.
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 Star 1100
star 1100 backfires on decel
Yamaha XVS1100 Service Manual
OEM parts for Yamaha
YAMAHA XVS1100 Owner Manual

Aug 14, 2011 | 2004 Yamaha V Star 1100 Custom

1 Answer

2009 Yamaha V-Star 950 backfires on deceleration


Hi, Cleavell33
COUGHING is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals.
POPPING or backfiring on deceleration is usually caused by a lean fuel condition or an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and torquing the exhaust clamp to the proper spec.
SPITTING is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw is adjusted too lean.
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.starbikeforums.com/forums/49-v-star/849-backfire-problems.html
09 VStar 950 Vance and Hines pipes Backfire on decel Fixxit
2009 2012 Yamaha XVS950 Star Service Repair Manual DOWNLOAD Download... $10
OEM parts for Yamaha
YAMAHA XVS950A Owner Manual

Jun 29, 2011 | 2009 Yamaha V Star 950

1 Answer

2004 v star 650 back cylinder does not fire


Hi, Lenbart1961 you are not getting fuel to the rear cylinder or it is not timed correctly 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 $0 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.starbikeforums.com/forums/49-v-star/12250-rear-cylinder-not-working-05-vstar-650-a.html
Will not fire on rear cylinder Yamaha Star Forum
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2003/LIT-11626-16-05_22.pdf

Jun 23, 2011 | 2004 Yamaha V Star Classic

1 Answer

Backfiring


If it uses points for ignition, check by substitution the capacitor across the points and indeed if using electronic ignition.
If the exhaust from both cylinders runs into a single silencer and one cylinder is misfiring, unburnt fuel mixture will explode in the silencer, sounding like a backfire.

Dec 26, 2010 | 2001 Yamaha V Star Classic

1 Answer

Backfires


YOU ARE NOT BURNING ALL THE FUEL IN THE CYLINDER HTE FUEL THAT ISNT BURNT GOES IN THE EXHAUST AND WHEN YOU DEACCELERATE IT WILL BACK FIRE SO THERE IS TO MUCH FUEL GOING INTO THE CYLINDER ON CARB THERE ARE 2 SCREWS 1 FOR IDLE AND 1 FOR MIXTURE ADJUST THE MIXTURE ONE SCREW IT IN 1/4 OF TURN AND TRY IT

Aug 24, 2009 | 1999 Yamaha V Star Classic

1 Answer

Bike backfires and at an idle it shoots out a blue flame


Purchase a EFI controller. I suggest a Fi2000R. It is easy to hook up and fairly easy to set by the instructions.

Aug 15, 2009 | 2004 Yamaha FJR 1300

1 Answer

Backfire


ya u got a exhust leak

Apr 03, 2009 | 2006 Yamaha V Star Custom

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