I have Drilled air filter and SIP road 2.0.
So, plug was indicating rich. So ive adjusted pilot mixture slightly, quarter turn in to lean up a bit and reduced main jet to 115. Im getting the following plug results following several chops
5 mile run at 30mph, ignition off, clutch in inspect. Then another 5mile run at around 45, chop.
A 2 mile run at 60mph ish, chop and 3/4 throttle.
Then a WOT on short stretch roads, 60mph +
The bogging gurgle at low speeds is much improved, tiny bit there but just seeking your advice as to colour of plug. The central porcelain is a sandy brown and the strap itself greyish. The outer part still looks black above the thread. The charts ive looked at say its normal colour but is not the illusive chocolate brown so much spoken of. Ive shone a torch through the cylinder head plug hole and it looks clean inside. Your opinions would be most welcome. Thanks