That doesn't make sense - high octane won't stop it from running. If the octane level is too low it will ping - that is - it will ignite on compression and cause the engine to stall at low revs. Stay with the 98, half the time I'm not sure that 98 is in fact 98.
I'm not up on the whole modern motorcycle engine thing - though I get the EMS is made up of oxygen sensor in the exhaust pipe and a temperature and rev monitor somewhere. The ECU gathers this info and controls the fuel injectors.
So if it runs well but won't idle, it is either air, fuel or electrical.
BTW - These black singles are built in China not Norway like the silver Rotex ones. My neighbour got a real lemon of a motor in his new G 650 GS and it took all manner of pain to get it right.
Last edited by Edd2; 04-23-2011 at 08:08 AM.
Reason: had more to say