Is the plug really that white or is it because the pic is taken with flash. The insulator on my plugs are just very light grey. The rim of the thread is black, which my dyno man says is because of the ethanol in the fuel.
For me the best way to see if a cylinder is fireing is to spit or dab some water on the exhaust manifold.
Thanks John that's a very useful tip.
I use one of those infra red thermometer things that you just point and press, gives a reasonably accurate spot temp - super useful for lots of stuff (balance your CH radiators at home properly) (is the LH brake drum
really hotter than the right ?) and not expensive from the usual online sites
