SOHC.co.uk Forums > CB500/550

sparks color

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murdock:
What do you think should be the perfect color of a spark plug in the cb four? ,
 dark brown ?,
light brown ?,
 gray? ,
White ?

deltarider:
Cafe con leche  ;) o marrón leonado (fawn brown).

Bryanj:
You cant get a decent plug colour with all this ethanol

deltarider:
In the other thread I've suggested a spoonful of castor oil.

K2-K6:
I run castor oil in a old V8 car engine, purely because it smells so nice.

Mixed at 100:1 just to give it a very low blend, haven't thought to check plugs for colour but may pull one out tomorrow to have a look.

In a lawnmower and petrol generator too, lovely smell of racing R when using the generator for circular saw etc on site.

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