These events may make interesting reading or familiar frustrations. On the 2000 kilometre position of a ride uphill to North Queensland from Central Vic the 2001 St2 failed to come back to life after a fuel fill. At random times on the ride there was a backfire at startup. At a fuel stop it just didn’t restart with no backfire. The next day of the unplanned stopover it’s still dead so I get it towed to civilisation ( Mackay) and the deal is that you must have it go into a shop of your choice to get the Auto Club to pay for the tow. So my man at said shop puts in new plugs and it comes to life ! Diagnosis is both plugs failed together. Oh dear I said to myself, why didn’t I think of that! What I did think to ask of was did they test the supposedly dead plugs? So I go back to get it from the shop and ride to Townsville. Ran well for three weeks until a cold start backfire and no go. So I left it at work overnight and sure enough it goes first press of the button the next day. This time I cleaned the CPS surface and checked all connections and wiring plug sockets.The only work to do was a spark plug cap clean out on the horizontal cylinder.I wonder if anyone’s had the ominous backfire and lack of startup .