March 9, 2016 8:06 PM PST
monster666 welcome from Portugal. The only octanes I've seen in Europe are 95 and 98. Sometimes when I run 95 my Lowrider will ping a little. I stick with 98 and have no problem.
March 9, 2016 11:13 PM PST
Welcome from the At-Large member (currently in Terlingua, TX) to the Best Damned Family Friendly Biker site on the entire web.
It is very difficult to tell from a description of a noise. I recommend you have it looked at by a 'trusted' Mechanic.
March 14, 2016 11:11 PM PDT
Cheap gas I would say. Those kind of engines need high octane at least 93.