Heres 2 pics of my older plug i had cleaned up previously,not sure how accurate i can judge it since its about 6 months old.
Looked not too bad after a run on the 110 jet and filter fully open. The insulator was already brown before i started, maybe from test runs at the weekend.
Heres the new iridium plug after a run of 6-7 miles mostly at WOT. It was dark when i took these pics so the colours are not exact but not far off the actual.
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I still think i need a little bigger yet, im going to order a 112 and a 115 tomorrow. Plan on running it to work and back tomorrow then ill check plug again tomorrow night.
Ran it to 78km/h and it was only at about 6750 rpm so i think i still got a little power and top speed to squeeze out of it yet.
Once i get the jetting exact i thin i'll get another 3-4 mph, then i can try a few of the other belts i have and finalise my spring tune.