Yes, Tickster is right on this one! ; we should not be in a rush to out engineer the engineers, and we do not want to do some experimentation that will put both our bikes and factory warranty in jeopardy, but I am hoping that some engineer from BMW Motorrad is watching our posts. The OEM dual electrode plugs and the iridium plugs are both called out for interchangeable replacements on some of the KTM bikes. The iridium version is not specified for the BMW S1000RR and it may well be because of the very high combustion chamber pulses and turbulence at very high pressures and rpm. Remember that the S1000RR develops 200 BHP per liter at 14,000 rpm and the G310 develops 103 BHP per liter at 10,500 rpm. I am hoping that the engineers take another look at this fitment for the G310, as it may be a very good choice for the future. But that is for them to figure out! If there are no downsides to fitment, it is quite possible that the platinum plug may give better cold start performance (which would be good) as there is some evidence that in certain applications, iridium fine electrode tips will give better ignitability with less than perfect fuel air mixtures at cold engine start up.
But I found this response from one of the S1000RR forums. Here is the response from an NGK representative a couple of years ago to a fellow with an S1000RR.
"I see that the LMAR9D-J (1633) NGK's are OE fit.
But I've also found the LMAR9AI-8 in Iridium format.
Has anyone tried the latter? I asked NGK about the LMAR9AI-8's as replacements for the standard fit plugs.
"Essentially, yes, the Iridium plug you mention is an upgrade. However, we
do not publish this as the LMAR9D-J is a twin ground electrode plug.
Although some engines are specified with multi ground electrode plugs to
help extend service life, for motorcycles it is sometimes to increase
strength of the ground electrodes. They are short and relatively straight
and are able to withstand harsh combustion vibrations which can sometimes
be present. We do not know if the strength aspect is an issue with your
model so cannot say if a conventional 'J' shaped ground electrode plug
would be affected in any way."
I think that translates to, technically they fit but they might not survive the environment."