98RON & older engines

[mudnut]

@Plasnart if thats what he is telling you i suggest finding a new motorcycle mechanic.

as to doms original question yes 98 octane will allow for a much better compromise setting between petrol and gas, as for remote travel you can get pretty potent octane booster additives which could be easily carried to give regular 91 octane a bump up if required

the rb30 is/was designed as an unleaded engine (being an alloy head it has to have hardened seats) so is fine without the upper cylinder lube

if you want to get the most out of it just bump the timing up on petrol until it pings under load then drop it back down by a degree or so

That is how I timed the engine after a mechanic changed out the timing belt and the engine was pinging under load. It was only after I had to renew the head gasket because a couple of fire rings had cracked, it was explained to me that silent detonation had caused the engine to run hot and caused the cracks. If I was to tune the engine to run properly on RON 98 I would get it dyno tuned, but that is just me.