Spark plugs fouling!

[jdbuell]

[mad]
I have a o8' lightening with a Jardine can, EBR ECM, performance filter and I was playing with a decible meter app on my smart phone. I started it three times and shut it down within a few minutes each time. It sat for a few days, weather turned warm, went to start it and its running on one cylinder. Shite!

This happened before when I got the Jardine put on and I was showing my friends how it sounded. Now I have to remove the damn plugs again. They were new last summer. Can I just take them out and clean them? Why is this happening when I run it and shut it down a couple of times in a row? How do I prevent this from happening?

 

[garyphantom222]

I think it is doing that because these bikes dump lots of fuel into the cylinders when you run it and shut it off and the fuel doesn't burn quickly,I have had this happen a couple of times also,my advise may be to start it and warm it up then drive it,you could clean the plugs and see if that works or buy new ones.

 

[Lesley]

How do I prevent this from happening?

The manual says allow bike to warm up before riding and to NEVER tether/bilp the throttle.
And plus 1 million to this

because these bikes dump lots of fuel into the cylinders when you run it and shut it off and the fuel doesn't burn quickly,I have had this happen a couple of times also,my advise may be to start it and warm it up then drive it,

 

[EricZ]

I recently read up on spark plug technology on NGK's webpage, and think this link would be good to share. There are several pages that talk about spark plug design and function, but this page in particular should help clear things up:

http://www.ngksparkplugs.com/tech_support/spark_plugs/p2.asp?mode=nml

In talking with someone on the NGK tech line, I learned that, generally speaking, they recommend to start with the OEM recommended plug heat range, and move up or down one heat range with every point up or down change in static compression ratio from stock, and one heat range colder for every 10psi of boost additional for forced induction motors.

Iridium plugs not only last longer, but they resist carbon fouling better than plugs with standard electrode materials, so you could try a OEM heat range iridium plug if you do a lot of start and stop riding.

 

[anrkizm95]

I was playing with a decible meter app on my smart phone. I started it three times and shut it down within a few minutes each time

dont do this again

put these in

 

[natez1]

08 and up have a plug cleaning procedure that involves twisting the throttle a certain number of times or something. do a search I'm sure it's here.

 

[natez1]

SPARK PLUG CLEANING PROCEDURE

2008 XB and 1125R - has the ability to clear residual fuel from the combustion chamber if a flooded engine or fouled spark plugs are suspected. This is achieved by opening the throttle to wide open, setting the Run/Stop switch to Run then, turning the ignition switch ON. This will fire the spark plugs for approximately 4 seconds, burning any fuel left over in the combustion chamber. It may be necessary to repeat this procedure several times to allow a severely flooded engine to start. NOTE: Motorcycle should be in Neutral. end.

 

[anrkizm95]

a spark plug clean can be initiated manually. Repeat the following sequence three times.
1. roll and hold the throttle wide open
2.turn the ignition to ON
3.wait three seconds
4.release the throttle grip
5.turn the ignition to off

 

[EricZ]

The DCPR9EIX plugs are what I just ordered for my bike with a recommendation by the guys at NGK, but those are going in a ~230hp 22psi turbocharged motor, extremely different than a stock XB.

They are really too cold of a plug for stock or even most modified XB motors, and while they may work because they are iridium and don't carbon foul as easily, the DCPR8EIX plugs are a better choice for an XB.

 

[anrkizm95]

the DCPR8EIX plugs are a better choice for an XB.

unless you have done some mods and are lean or its 103 deg the 9 is a much more forgiving plug.a lot of members have problems with the 8 even with a stock engine.

 

[konarider94]

They are really too cold of a plug for stock or even most modified XB motors, and while they may work because they are iridium and don't carbon foul as easily, the DCPR8EIX plugs are a better choice for an XB.

I agree, I run the DCPR8EIX.

 

[devonbiker]

a spark plug clean can be initiated manually. Repeat the following sequence three times.
1. roll and hold the throttle wide open
2.turn the ignition to ON
3.wait three seconds
4.release the throttle grip
5.turn the ignition to off

So at what point should you start the bike? How can this procedure "clean" fouled plugs if the engine isn't turned on?

 

[oh9bolt]

Right after you do it.......