« previous next »
Pages: [1]   Go Down

Author Topic: all 4 plugs soot fouled  (Read 742 times)

0 Members and 1 Guest are viewing this topic.

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
all 4 plugs soot fouled
« on: September 01, 2013, 08:14:35 AM »
bike has been running intermittently great but i pulled the plugs and they have the black soot issue,i went from a 140 main jet to a 120 and she still ran fine but plugs still sooting up should i should i go to a leaner jet110 or i am thimking it might be spark not burning fuel well enough
Logged

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
Re: all 4 plugs soot fouled
« Reply #1 on: September 01, 2013, 08:43:31 AM »
i am running #40 for slow jets ishe doesn't idle well either so i was thinking of going to a differnet # slow jet if i do which way leaner would be what a #38?
Logged

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,360
Re: all 4 plugs soot fouled
« Reply #2 on: September 01, 2013, 10:41:15 AM »
What bike are we trying to sort the problem here?
Logged
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0

Offline dave500

  • Really Old Timer ...
  • *******
  • Posts: 17,068
  • WHAT?no gravy?
Re: all 4 plugs soot fouled
« Reply #3 on: September 01, 2013, 12:40:57 PM »
pods and open pipes like in your avatar?
Logged

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
Re: all 4 plugs soot fouled
« Reply #4 on: September 01, 2013, 12:50:44 PM »
Yup, the black is just the soot,cleans right off,not wer black
Logged

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
Re: all 4 plugs soot fouled
« Reply #5 on: September 01, 2013, 03:47:31 PM »
po had 140 main jets to start then i went to 130' now 120'still sooting up,crazy thing is if i pull the carbs and clean then put back on she runs great then slowly after putting some miles on her she starts to run worse But even when running great the plugs start to soot up so i think i have more than 1 problem,but man when she is running good she idles,shifts,and has full power,i do have coils from either a 650 or 1000cb   (7 mill  coil wires by accell)    but they have like 4.8 ohms,runnings points(they are not new either are the condesors)valves adj,new aftermarket tank,nice and clean inside and i am running a gas line from the tank to carbs 1&2 and a seperate line to 3&4 with in line filters,4 into 2 exhaust(no baffles) pods for air filters
Logged

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
Re: all 4 plugs soot fouled
« Reply #6 on: September 02, 2013, 02:22:29 PM »
carbs coming off again,carb 2 overflowing even with new floats and they were set right on 26mm,one thing thow the float needles from the rebuild kit are slightly longer than oem ones so i figure that would affect my float height setting the spring loaded vlier is about .030 longer
Logged

Offline grumpy

  • HUH?!?! ME!?!? I'm not a freakin
  • Expert
  • ****
  • Posts: 1,358
  • ..... '73 750K3 .....
Re: all 4 plugs soot fouled
« Reply #7 on: September 02, 2013, 03:17:17 PM »
yea - make sure all the floats / needles / etc are physically all the identical.
specs of the various rebuild kits vary A LOT.
spring for a new set of honda OEM, it'll save you some grief down the road.

also - are you sure the fouling is from the mains? could be the slide needles are too high. or those tiny air passages to the emulsion tubes might be gunked. or maybe the air screws are off....


Logged

Offline neilc

  • Hot Shot
  • ***
  • Posts: 477
  • old school biker,other bike is a 2003 vtx1800c
Re: all 4 plugs soot fouled
« Reply #8 on: September 02, 2013, 04:01:32 PM »
Everything is.clean,i am going to lower needles to lean out bike more, and have figure new float height due to diffetences in float needle length
Logged
Pages: [1]   Go Up
« previous next »