Thanks everyone,
Well, I have been buying the 'best' gas since leaving the States (ie. the highest octane rating).
I have definitely had altitude trouble at anything around 10,000ft and higher. But the symptons were more a lack of power and spluttering.
Today I rode from Costa Rica into Panama. The highway through Panama is near sea level and the bike ran much better (I had filled up with 95 octane gas). But still there was the ocassional pinking/pinging noise when I went uphill.
How long will it take to make a hole in my piston? I see a sleepless night ahead...!
Thanks again.
Lois
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