Backfiring like mad - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 18 (permalink) Old 07-05-2015, 04:07 PM Thread Starter
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Backfiring like mad

bike backfires like crazy now. Is that common after doing th ear shave? Also stalled out just sitting in traffic before. Anyone know if I'm running to rich or not?
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post #2 of 18 (permalink) Old 07-05-2015, 07:27 PM
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I'd check the ports that need plugged are. Backfiring while deaccelerating, or always?
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post #3 of 18 (permalink) Old 07-05-2015, 07:38 PM Thread Starter
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While decelerating. Also pops loud when starting.
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post #4 of 18 (permalink) Old 07-05-2015, 07:43 PM
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Original exhaust? Check for carb boot leaks.
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post #5 of 18 (permalink) Old 07-05-2015, 07:53 PM Thread Starter
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Yea original exhaust. I'll check the carb boots. I had a problem of it dying while riding too. Thinking its poogs but I need to find a way to stop it haha. I have a charity ride in 2 weeks
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post #6 of 18 (permalink) Old 07-06-2015, 07:59 PM Thread Starter
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Any other help?
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post #7 of 18 (permalink) Old 07-06-2015, 08:38 PM
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It sounds like something is definitely wrong; it shouldn't be backfiring when starting nor dying at lights.

I always have issues backfiring when starting when my battery is weak; make sure that isn't the case just for giggles. Check your charging system and make sure it's working properly. Dying at lights could also mean you aren't charging enough, and voltage drops too low. You should see near 14v @ 5000rpm with a DC multimeter.

Pull your spark plugs; are they wet with gas, white and dry, etc?

Let's also get some more details on how you did your earshave. What pod filters, what jet sizes, what elevation are you at, etc.

If you feel it's poogs, pop the gas cap when you're having issues. Do you hear a hiss or noise like it may have been under pressure/etc? If so, perform the steps to clean the vent lines in the tank/cap.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #8 of 18 (permalink) Old 07-07-2015, 12:11 AM Thread Starter
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Bike fires up every time without a problem so I don't think the charging system is to blame. And the ear shave I did is http://06vn750.blogspot.com/2011/05/...ormat.html?m=1 . So my jets are 142-42.
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post #9 of 18 (permalink) Old 07-07-2015, 12:15 AM Thread Starter
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Wish I could just afford a damn mechanic. Really thinking about selling her. My truck and bike are both constantly having issues.
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post #10 of 18 (permalink) Old 07-07-2015, 12:45 AM
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Check out the other stuff. pull the plugs, are they wet with gas? Could be a stuck float or something.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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