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SPARK PLUG Electrode Colours?
Posted: Mon Apr 24, 2017 9:58 pm
by DKWW2000
Removed my 2 NGK Leading plugs to check & clean & found that the rear plug was a lot lighter coloured than the front which I think shows the rear is running a lot hotter than the front, any suggestions?
Both the trailing are the same normal golden colour.
Re: SPARK PLUG Electrode Colours?
Posted: Tue Apr 25, 2017 9:29 am
by spirit r
Check your Nikki, Pete.
Re: SPARK PLUG Electrode Colours?
Posted: Tue Apr 25, 2017 6:30 pm
by TOOL
Rear chamber is lean.
Re: SPARK PLUG Electrode Colours?
Posted: Tue Apr 25, 2017 7:46 pm
by DKWW2000
TOOL wrote:Rear chamber is lean.
That is what I thought, what is the best way of rectifying this? The mixture screw adjusts both rotors so is there another adjustment for each individually or is it a carb rebuild?
Re: SPARK PLUG Electrode Colours?
Posted: Wed Apr 26, 2017 9:07 am
by spirit r
Clean the sparks. Make a Test drive on the primaries only.(3000U/min)Control the rear trailing spark.
Clean the sparks. Make a Test drive on the secondaries (full throttle
) Control the spark.
The spark is lean on both test. Rebuilt the carb. Otherwise cleaning the Primary or secondary fuel Jet of the rear chamber inside the nikki.
Re: SPARK PLUG Electrode Colours?
Posted: Wed Apr 26, 2017 10:00 am
by TOOL
As above. Pull the jets out and hopefully one's a bit blocked on the rear rotor side.
Re: SPARK PLUG Electrode Colours?
Posted: Wed Apr 26, 2017 11:45 am
by DKWW2000
Thanks guys, I have a spare Carb & a Re-Build kit so I think I will do a straight swap once done.
Re: SPARK PLUG Electrode Colours?
Posted: Wed Apr 26, 2017 1:49 pm
by spirit r
DKWW2000 wrote:Thanks guys, I have a spare Carb & a Re-Build kit so I think I will do a straight swap once done.
Pete do not change the two needle, seats and float. Only clean them and put a little two Stroke oil inside. I made my own caburator Kit and take dirko paper as you can read in my post. Remove the two little fuel filter before the needle they are crap. I am mounting an extern fuel filter before the carb fuel horn for a better flow.
Re: SPARK PLUG Electrode Colours?
Posted: Wed Apr 26, 2017 7:51 pm
by DKWW2000
spirit r wrote:DKWW2000 wrote:Thanks guys, I have a spare Carb & a Re-Build kit so I think I will do a straight swap once done.
Pete do not change the two needle, seats and float. Only clean them and put a little two Stroke oil inside. I made my own caburator Kit and take dirko paper as you can read in my post. Remove the two little fuel filter before the needle they are crap. I am mounting an extern fuel filter before the carb fuel horn for a better flow.
Vielen Dank Thomas, Ich werde mich erinern
