Uneven sparkplug colour
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wrote on 14 Aug 2019, 07:51 last edited by
Hi.
I am trying to tune idle mixture (0-1/8 turn of throttle) but whenever I screw out the spark plug its colour is uneven.
Which side of the sparkplug is important to me?
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wrote on 14 Aug 2019, 09:30 last edited by
Looks good to me pal.
Plug chops only really give you an indication when wide open throttle is applued at load.
For idle you will need an afr or colortune gunsome indicator.
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wrote on 14 Aug 2019, 10:02 last edited by
Oh I did not know that...
My method was that I turned out A/F screw about the same as the manual says (28mm Mikuni - 1 and 1/4). Then i went for calm ride using only up to 1/8 turn of the throttle. After 10km I checked spark plug and based on colour of it I further turned the A/F screw inwards. So I did not base on factory setting but on colour of spark plug...
I hope my English is understandable enough...