View Full Version : fouling plug
7OahuEx
01-21-2006, 09:24 PM
Having a problem with plug fouling. I have a pretty stock 03 400ex, white bros rev-box e-series slip on w 14 plates. I ride with cr and kx 250's so i'm riding pretty hard and fast but if i slow down and cruise for a day the plug is fouled by the next day. I'm still running the stock NGK plug, just replacing it about every 2 to 3 months. Any thoughts would be appreciated.
Ride Red:devil:
Do you use the choke when you start it??? IF so quit...
Possibilities:
plug needs regapping
rev box issue
fuel A/F screw need adjust
oil/carbon fouled
weak coil
wrong heat range plug
jet/carb issue (float stuck, wrong jet, needle seat worn?)
do you have problems starting?
7OahuEx
01-23-2006, 04:53 PM
I ride on the weekends so it's always the first start of the weekends that it gives me trouble.(cold )
After it seems fine until the first start of the next weekend.
Thanks for the responses and I'll try starting without the choke also.
Crazy Diamond
01-23-2006, 05:01 PM
Mine won't even start without the choke. And if I don't let it in the #2 position for a minute then let it warm up it fouls a plug! Not right then but the next time I start it.
Yes these engines are like a 2 stroke it seems. And getting at the plug when shes hot :o :huh :ermm: or even getting at the plug on a good day :rolleyes:
7OahuEx
01-23-2006, 07:44 PM
Yeah, tried to start without choke,---no dice---
As soon as i put the choke on it started after 2 tries.
Are any of you using a rev-box with the stock engine?
Any spark plug heat range changes.?
With the slip on e-series and 14 plates with the stock rev box, there were never any problems.
I Don't think of this as a major problem just a pain, having to carry extra plugs.
Thanks for your replies hope to have some updated photos soon.
Thanks,
Powered by vBulletin® Version 4.2.1 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.