Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Roy.honda on August 10, 2016, 08:21:21 PM

Title: Carbon on No. 3 plug
Post by: Roy.honda on August 10, 2016, 08:21:21 PM

I've checked all the spark plugs. They are all ok. But the No. 3 plug has carboned up dark brown colour. It's not wet. Any ideas?

Title: Re: Carbon on No. 3 plug
Post by: Johnwebley on August 11, 2016, 08:26:56 PM

sounds over rich,check float height,needle position,is the main jet in place,are all the other jets corrected and fitted correctly,


 swop the plug to another pot,and see what happens,