Question about 1993 kawasaki VN 750 Vulcan

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Vulcan 1993 750 backfire issue everytime i let off

1993 vulcan 750 backfire issue everytime i let off gas

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Did I you change the pipes or hi flow air filter?? If so you are running lean and need to rejet or at least adjust air screw on carb.

Posted on Oct 21, 2012

  • Glenn B Oct 21, 2012

    Did I you change the pipes or hi flow air filter?? If so you are running lean and need to rejet or at least adjust air screw on carb.

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This is often caused by an air leak , inlet manifolds, exhaust gaskets into the head or the gaskets between the headers and muffler.
This is assuming all the rest of the bike is set correctly, valve clearances,airfilter, clean carbs

Posted on Jul 16, 2010

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Posted on Jan 02, 2017

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I have a 2007 kawasaki vulcan 1500 classic fi ... I love the bike bit when it start to warm up it seems to miss really bad and decelerating it backfires and pops ... what could my problem be ?


Hi, Gregory love that name and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. 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.
7. Intermittent short circuit due to damaged wire insulation.
8. Intake air leak.
9. Water, dirt, or rust in the fuel system, fuel pump and/or filter.
10. Faulty fuel pressure regulator
11. Fuel tank vent system plugged.
12. Throttle body controls misadjusted.
13. Damaged throttle body or intake seals.
14. Loose, dirty, or corroded ignition module connector at crankcase.
15. Faulty MAP, CKP, O2, and/or CMP sensors.
16. Incorrect valve timing.
17. Weak or broken valve springs.
18. 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.
Running rough and backfiring Vulcan Bagger Forums
Vulcan 1500 backfire popping and cracking pipe problem LocalRiders com
http://www2.vulcanrider.se/DL/00-08ka-smcvulcan1500classicfi-s.pdf

May 24, 2016 | kawasaki Motorcycles

2 Answers

I have a 99 Kawasaki Vulcan classic one car bike why would the bike flood the back spark plugs and put gas in my air filter been trying to figure it out but I need help


Hi, Brandon my guess is you have a faulty spark plug or spark plug wire/cable or ignition coil or wiring to the coil is corrupt, check the ohm reading on your plug wires/cables for more information about your question and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Rear plug fouling Kawasaki Vulcan Forum Vulcan Forums
Plugs fouling and leaving me stranded Kawasaki Vulcan 750 Forum Kawasaki...
http://www.kawasakimotorcycle.org/forum/kawasaki-cruisers/155449-1998-1500-vulcan-classic-fouling-plugs-rear-cylinder-only.html
http://www2.vulcanrider.se/DL/KawasakiVN1500_87-99ServiceManual.pdf

Apr 29, 2016 | kawasaki Motorcycles

1 Answer

2000 Kawasaki Vulcan en500


FAULTY SPARK EITHER PLUG WIRE PISTON OR CLOGGED CARB OR NEEDS TO BE ADJUSTED

Jun 15, 2013 | Motorcycles

1 Answer

Running a little ruff......popping and hesitation and backfiring.


check to make sure you didn't get bad gas some where is it a cali model be couse your carbs can over flow and you will never know it just all goes into the charcoal canister in the front bottom of the radiator is allow raw gas to enter in the air side of the carb un metered

Jun 26, 2010 | 1996 kawasaki VN 1500 Vulcan Classic

1 Answer

Engine missing,backfires, runs rich, replaced old gas


Replaced old gas then i am assuming the bike was not used for some length of time? If you have old gas in the tank and the bike was not used the gas in the carbs would have gummed up the jets in the carb or carbs.
sounds like its time for the carbs to be cleaned.

May 06, 2010 | 2004 kawasaki VN 1500 Vulcan Classic

1 Answer

My vulcan 1500 1997 back fire somme time wy


lean gas mixture. or the valve timing is off, but probably both. A lean mix will run really hot and allow for secondary combustion in the pipes (backfire) when the valves let even a bit of uncombusted gas through. My guess is that the bike hasn't had the carbs cleaned out thoroughly in a while. Run a half can of Sea Foam with your full tank of gas to help clean out the carbs, but really you should take them apart and dip them to clean everything out. Also you could adjust your pilot screw settings to make it run a bit more rich, but then you are just compensating for the dirty carbs. That's just my guess.

Jul 22, 2009 | kawasaki Full Suspension Mountain Bike Men

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