This any help? - Stolen from Wikipedia.
Thanks, it's interesting but the trouble is there is nothing specific to Triumph. On google I have found a general comment that Triumph bikes are ok for E10 fuel from the late 1990's but cannot find information on the triumph website or official manual. It just seems a bit vague. I have a Suzuki bike and a Harley and the manual for both of them states E10 is fine for them but nothing on official Triumph documents.
I have read horror stories about the damage this E10 fuel causes to some machines.