Question about kawasaki VN 1500 Vulcan Classic Motorcycles

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Just replaced fuel pump as that was diagnosed to be problem but still problem is evident

Bike will start up ok but dies when throttled up but she will run in a fashion with choke fully on ? any ideas

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  • kawasaki Master
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Carb is not letting enough fuel into the engine. That means the mixture is too lean. When you choke it, you restrict the air flow into the engine and now the air/fuel mixture is correct and it runs. Check the carbs and injectors if it has them.

Posted on Jan 23, 2016

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1999 honda vfr 800. Had a full service done on bike all fluids filters plugs etc. Bike starts ok but as soon as i turn the throttle bike dies no fault codes standing on bike


Hi, Walter you have fuel delivery issues probably carbs I hear your gas tank is begging for a can of Sea Foam 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 and not want to start or if it starts it will idle and run poorly then stall, 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 the battery needs to be replaced.
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 and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, 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, clean, and inspect fuel and vacuum lines and replace as necessary.
8. Replace spark plugs with new ones 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.
Bike idles perfect but dies when given the slightest amount of throttle 93...
Starts choke but dies with little throttle
1998 2001 Honda VFR800FI Service Manual VFR800 Moto Data Project
http://www.partsfish.com/page/oem-parts-for-honda
Honda VFR800 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Sep 09, 2016 | 1999 Honda VFR 800

1 Answer

Bike starts Ok runs for 3 mins then stops. seems to run longer on full throttle, when throttle is shut, bike stops as if running out of fuel


Hi, Raymond the following applies to carbureted also fuel injected models 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. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. A failed fuel pump, pressure regulator and or fuel injectors.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
70cc motorcycle start and then dies
Engine starts runs for 5 min then dies Sportbikes net
http://www.zxforums.com/forums/zx-7r-forum/35464-bike-runs-bit-then-dies.html
Bike runs fine for first 10 15 min then dies CBR Forum Enthusiast forums...

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 22, 2016 | Motorcycles

2 Answers

I can start my bike up, with full choke on, but after a few minutes it will die. Also, whenever I give it gas with the throttle, it immediately dies.


Something has to be fubar with the main jet circuit of carb. That explains why it starts and then shortly thereafter shuts down. Also explains why when you give it gas it cuts out cold.

U have ignition but NO engine will run without proper fuel flow.

Jul 31, 2015 | 1995 Triumph Triumph Thunderbird

1 Answer

2007 Yamaha V Star 1300 dies with throttle


Hi, Anonymous and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump or internal fuel line has pinholes.
17. Fuel injectors clogged or faulty.
18. Faulty throttle position sensor.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.starbikeforums.com/forums/49-v-star/68346-650-starts-but-dies-throttle.html
Bike idles perfect but dies when given the slightest amount of throttle 93...
Yamaha XVS1300A 2007 Service Manual
https://www.partsfish.com/page/oem-parts-for-yamaha
YAMAHA XVS1300A Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Mar 08, 2018 | 2007 Yamaha V Star 1300

1 Answer

Honda steed 600 starts ok but dies shortly after


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery must have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary 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. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Fuel tank empty
11. Fuel tank contaminated with ethanol sludge.
12. Water or dirt in the fuel system, or clogged filter.
13. Restricted, blocked or kinked fuel line.
14. Faulty fuel pump.
15. Faulty pressure regulator.
16. Faulty or clogged fuel injectors.
17. Lean angle switch is faulty or needs adjustment.
For more information about your issue and valuable "FREE" downloads that you need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Starts choke but dies with little throttle
Bike starts then dies starts then dies bike starts and runs
http://www.vt600vlx.com/VLX%20VT600%2088-89%2091-96%20Service%20Manual%2061MR107.pdf
http://www.partsfish.com/page/oem-parts-for-honda
http://www.vt600vlx.com/VT600C-1992.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Apr 15, 2014 | 1997 Honda Steed

1 Answer

Starts idles for a minute then dies


Have you checked the actual fuel pipes for flow ? You might need a carb refurbish kit. Weak vacuum causes similar type problems.

Apr 05, 2014 | Suzuki Motorcycles

1 Answer

BIKE CUTS OUT, BLIP THE THROTTLE AND ENGINE STOPS


sounds like fuel problem ! what bike have you got and is it carb or injectors , is it elec fuel pump or gravity fed and how old is the fuel in the tank ?

Mar 17, 2014 | Triumph 955i Speed triple Motorcycles

1 Answer

Firstly, my bike felt like it was running on three cylinders, reg-rec?


Hi, Peter 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. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Fuel tank empty.
10. Fuel tank contaminated with ethanol sludge.
11. Water or dirt in the fuel system, or clogged filter.
12. Restricted, blocked or kinked fuel line.
13. Failed fuel pump.
14. Failed pressure regulator.
15. Faulty or clogged fuel injectors.
For more information about your issue and valuable "FREE" downloads that you need please click on the blue links below. Good luck and have a wonderful day.
http://zx6r.com/zx6r/10307-bike-shuts-off-while-riding-help-please.html
Ninja starts but dies when open the throttle
Kawasaki Ninja ZX 6R Service Manual
OEM Parts for Kawasaki
Kawasaki Ninja ZX 6R Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Mar 14, 2017 | 1998 kawasaki ZX-6R Ninja

1 Answer

2003 yz 250 starts and idles but runs rich and bogs as soon as the throttle is applied


Hi, Anonymous and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Intake system air leak.
4. Vacuum piston malfunction.
5. Accelerator pump leaking or no output.
6. Plugged bowl vent or overflow.
7. Fuel level in bowl too low.
8. Restricted fuel supply passages.
9. Plugged jets or passages.
10. Worn or damaged needle or needle jet.
11. The enrichner valve not seated or leaking.
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.
2002 yz250 idles fine but bogs and tries to die when twisting the throttle...
Bike dies when you give it throttle
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Mar 19, 2012 | 2003 Yamaha YZ 250

2 Answers

No throttle when cold


HI

It is clearly that you have poor mixture.
Every engine needs more fuel in starting, thats the reason for the choke circuit.
But yours doesnt work as you said
Fix your choke circuit in your carbs and every thing will be OK
If you had problem with your fuel pump your bike never run ok cold or hot it dies in any throtlle response

Mar 28, 2009 | 1990 Yamaha FZR 250 R

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