SPARK PLUG Electrode Colours?

[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.

[spirit r]

Check your Nikki, Pete.

[TOOL]

Rear chamber is lean.

[DKWW2000]

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?

[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.

[TOOL]

As above. Pull the jets out and hopefully one's a bit blocked on the rear rotor side.

[DKWW2000]

Thanks guys, I have a spare Carb & a Re-Build kit so I think I will do a straight swap once done.

[spirit r]

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.

[DKWW2000]

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