Possible causes of wet fouling spark plugs

  • someonewakeuphicks
  • someonewakeuphicks's Avatar Topic Author
  • Offline
  • User
  • Posts: 14
  • Thanks: 0

Possible causes of wet fouling spark plugs

22 Aug 2016 09:25
#739497
Since I've owned my bike, I've had a trouble with wet fouling spark plugs that reek of gasoline. I've never had to troubleshoot an issue like this before and was wondering if anyone had some pointers.

I took it for a rip over the weekend and it would run fine but stall out when I got to a stop light unless I kept the idle up around 1500 rpm

I've already gone to a K&N air filter and BR7ES in hopes of getting more air and a hotter spark. I'm also still running points which look clean
Always remember to keep the rubber side down!

Bikes
'78 KZ650c2 - Current love affair
'04 Fz6 - Current daily rider (until the KZ is finished)
'82 XJ550 Seca - RIP Little Red :(

Please Log in or Create an account to join the conversation.

  • SWest
  • SWest's Avatar
  • Offline
  • Sustaining Member
  • 10 22 2014
  • Posts: 23327
  • Thanks: 2873

Re: Possible causes of wet fouling spark plugs

22 Aug 2016 10:54
#739502
Tight valves, weak coils, timing issues, jets too large, float level too high.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

Please Log in or Create an account to join the conversation.

  • 650ed
  • 650ed's Avatar
  • Offline
  • User
  • Posts: 15343
  • Thanks: 2830

Re: Possible causes of wet fouling spark plugs

22 Aug 2016 11:43
#739506
Try a set of ND W22ES-U spark plugs. They made a difference in my KZ650-C1. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

Please Log in or Create an account to join the conversation.

  • KZ650 Cafe
  • KZ650 Cafe's Avatar
  • Offline
  • User
  • Posts: 10
  • Thanks: 0

Re: Possible causes of wet fouling spark plugs

22 Aug 2016 12:49
#739515
i would imagine by what i read on here if you still have points start with resetting them no matter how clean they look. i have a 77 kz650 with a dynatek swap and i was getting spark before i hooked up the starter no im getting nothing.... lol but im sure your problem is your points, even though i hear alot of crap about ngk plugs... but idk i use the stock champions plugs.
Sam

Please Log in or Create an account to join the conversation.

  • 650ed
  • 650ed's Avatar
  • Offline
  • User
  • Posts: 15343
  • Thanks: 2830

Re: Possible causes of wet fouling spark plugs

22 Aug 2016 13:06
#739519
KZ650 Cafe wrote: ..... i use the stock champions plugs.

Champion plugs didn't come stock on my 1977 KZ650. Do you live outside the US? Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

Please Log in or Create an account to join the conversation.

  • KZ650 Cafe
  • KZ650 Cafe's Avatar
  • Offline
  • User
  • Posts: 10
  • Thanks: 0

Re: Possible causes of wet fouling spark plugs

23 Aug 2016 07:39
#739608
lol i live in texas, and i should have stock equivalant . . they are basically the same as B7es plugs. 7 temprature range and so on
Sam

Please Log in or Create an account to join the conversation.

  • KZ650 Cafe
  • KZ650 Cafe's Avatar
  • Offline
  • User
  • Posts: 10
  • Thanks: 0

Re: Possible causes of wet fouling spark plugs

23 Aug 2016 07:43
#739612
reset the points and stick with the stock filter until you get a jet kit. if the bike has sat for any length of time no matter how clean the points look check them, i recommend going with dynatek dyna s system for the bike from dennis kirk. set it and forget it i never have any starting issues now that ive converted, and sometimes i run a little hotter plug just for a little more power if i decide to run av gas.
Sam

Please Log in or Create an account to join the conversation.

  • KZB2 650
  • KZB2 650's Avatar
  • Offline
  • User
  • Posts: 1475
  • Thanks: 265

Re: Possible causes of wet fouling spark plugs

23 Aug 2016 08:17
#739618
Maybe check the things Steve said and are your Champions 4s (I personally like em and have used them).... maybe stay away from the resistor NGK's ..... av gas sounds good but if you have a stock comp motor your probably loosing a "little" power instead of gaining over 89 oct...... and I love my Dyna S too.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.

Please Log in or Create an account to join the conversation.

  • bountyhunter
  • bountyhunter's Avatar
  • Offline
  • User
  • Posts: 7246
  • Thanks: 338

Re: Possible causes of wet fouling spark plugs

24 Aug 2016 00:02 - 24 Aug 2016 00:04
#739711
someonewakeuphicks wrote: Since I've owned my bike, I've had a trouble with wet fouling spark plugs that reek of gasoline. I've never had to troubleshoot an issue like this before and was wondering if anyone had some pointers.

I took it for a rip over the weekend and it would run fine but stall out when I got to a stop light unless I kept the idle up around 1500 rpm

I've already gone to a K&N air filter and BR7ES in hopes of getting more air and a hotter spark. I'm also still running points which look clean
sounds like flooding from carburetor floats not cutting off fuel at correct level.

Have no idea how points or plugs can cause gas flooding...... :huh:
1979 KZ-750 Twin
Last edit: 24 Aug 2016 00:04 by bountyhunter.

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum