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My v star 650 is loading up in rear cylinder. I have clean the carbs. Put new pick up coil and stator. Still spitting gas out of rear cylinder pipe. Dont know what else to do.

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  • 21 Answers

Not trying to seem like a jerk but did you replace the spark plugs? It may still get spark but it can sometimes be too weak to get ignition (check by pulling the plug out, putting it back on the boot, touching the plug to something ground on the bike like the engine, then turn it over to see if spark is jumping the gap). The obvious thing is that you're not getting spark, the next thing coming to mind is good ground. Hopefully this helps.

Posted on Nov 14, 2016

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2007 650 yamaha vstar popping through the rear cylinder exhaust

First off did you buy it new? Second has it gone through its break in tune up yet?Did you do the re jeting? My guess is it was re jeted wrong & neeeds to be re jeted again or could also need more air(upgraded air kit) or a tfi or power comand fuel mod.My bike also poped untill I did the air & fuel upgrades & them upgrades will also give you a much needed house power needed for this rig.


Bring it to a shop & have it looked at.......


Good luck

Posted on Apr 26, 2009

  • 221 Answers

SOURCE: wire connector between stator & voltage reg/rectifier burnt

your voltage/reg. can be tested in a couple different ways check ground res. check res. then revs. bias on diodes you have ac in dc out it sounds like you may have a diode gone bad allowing ac curent to flow causing the wires to get hot

Posted on Jul 31, 2009

robotek
  • 1512 Answers

SOURCE: 350 raptor only runs with full choke on ,

Hi Mike,
You will find that there is a problem with the carbie. It runs with the choke on because the choke engages the "enricher" circuit. The idle circuit is different a different circuit inside the carb. When just crack the throttle on, you use the pilot circuit, and then main jet with more twist of the grip. You will need to completely strip the carb, remove all jets, spray carbie cleaner throughout, and blow out all capillary tubes and holes inside the carb with compressed air. Pay particular attention to the fine holes inside the venturi near the butterfly valve. You may need to use a fine piece of wire, like a guitar string to open up any that are clogged.
There is not much else that will cause the symptoms you have. Check for air leaks about the inlet manifold also, spray some carbie cleaner about the manifold connections boots, the revs will change when it sucks up the cleaner through the leak.
Happy to talk to you more about it.
regards robotek

Posted on Jan 24, 2010

  • 17 Answers

SOURCE: My suzuki intruder is missing backfiring on the

Did you sync the two carbs? If not the rear may be getting all the gas from the rear carb and none to the front. Twist throttle engine off and see if front carb cable is pulling the carb open.
Also unscrew the spark plug boot from the front spark plug wire and trim 1/8th inch off the wire and screw the boot back in. The plug wire end may be corroded on that wire.

Posted on Feb 08, 2010

  • 17 Answers

SOURCE: Runs on back cylinder but front cylinder pops a little when idlin

This particular model uses a BS36ss carb for the # 1carb or back as you are calling it. there is an input and output as a pass through to the second carb intergrated into the fuel delivery system of the # 1 carb. the # 1 carb draws fuel from this port also. check for obstructions at this point where the 2 carbs intersect and in the transfer line to the front carb remember this is a neg. pressure regulated fuel system so any leaks at carb 2 (Front Carb) or Balance Tubes Between cylinders and it wont function . vacuum is the key

Posted on May 27, 2010

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2004 V-Star 650 has been sitting for two months. Started out being difficult to start, now won't start at all. I have spark to both cylinders and just thoroughly cleaned the carbs (disassembled, cleaned...


Hi, Anonymous your not getting fuel if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and replace the battery.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove your air cleaner and clean and re-oil per Mfg. specifications.
6. Remove the carburetor, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
8. Replace spark plug with a new one and check for spark.
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.
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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

Oct 30, 2013 | 2004 Yamaha V Star Classic

1 Answer

My 1979 KZ650 SR coil not getting power?


If I remember it shouldn't have points, when you had the carbs off did you unplug any of the harness, I beleive coils 1-4 and 2-3 are powered by the same source. also there should be a pick-up coil it's down on the stator. As for the fuel issuedid you have a bad needle and seat or something holding it slightly open causing it to over fuel/ rev up.

Jun 07, 2013 | 1979 kawasaki Z 650 SR

1 Answer

Need to test my pick up coil on my 2000 yamaha vstar 650 classic


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 $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.
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98 00 Yamaha XV650 Star Service Manual XVS650 Moto Data Project
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Jul 27, 2012 | 2000 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
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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

2002 v star 650 no spark rear clyinder only


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
6. Faulty ignition coil or ignition / electronic module
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
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.
2005 650 with no spark at rear cylinder Yamaha Star Forum
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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

May 31, 2012 | 2004 Yamaha V Star Classic

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

3 Answers

Front cylinder misfire at idle,then raise rpm's to 2000 area an it comes in an out popping thru exhaust.front cylinder cold to the touch when rear is hot, till it runs a couple of min. New plugs, good...


I am not sure if the bike is a 650 or 1100 but in either case it sounds like a fuel issue or and air leak. When the carbs were off for re-jetting did they get cleaned? The slow circuit controls to about 2000 rpm and it sounds similar to your problem.

The first thing to look at is the carb synchronization. If the front cylinder is lagging, it can give the same symptoms. I do not think that the exhaust is a factor because the front is cold when running.

Spray some WD 40 at all the intake manifold area when the bike is running and see if the idle changes. the idle will change and push some smoke out of the exhast if the intake is leaking.

If both of these check good I would pull the carbs back off and clean the slow circuits out completely. This is delicate work and shoud be done by and experienced tech.

If I can help some more just send message.

I hope that his helps. Steve

Jan 18, 2011 | 2004 Yamaha V Star Classic

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

2007 650 yamaha vstar popping through the rear cylinder exhaust


First off did you buy it new? Second has it gone through its break in tune up yet?Did you do the re jeting? My guess is it was re jeted wrong & neeeds to be re jeted again or could also need more air(upgraded air kit) or a tfi or power comand fuel mod.My bike also poped untill I did the air & fuel upgrades & them upgrades will also give you a much needed house power needed for this rig.


Bring it to a shop & have it looked at.......


Good luck

Apr 25, 2009 | 2003 Yamaha V Star 1100 Classic

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