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Canadian Daves JustKDX
93 octane.....pros vs cons?
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[QUOTE="OLHILLBILLY, post: 1338740, member: 70633"] Totally different deal I know but.. It's a well documented fact that using pump 91-93 octane in a stock compression Hayabusa motor will carbon up the exhaust valves almost like running 40:1 pre-mix in them would. 87 octane will yield a clean motor that doesn't ping and will run 80,000 miles with no issues. I've always understood that higher octane gasoline just burned a little slower than lower octane fuels making pre-ignition (ping) harder to happen. Thus the dirty combustion on the Busa motors using higher than required octane fuel. I dunno, but I go along with the theory of higher octane fuel (in a motor that doesn't require it) will make slightly (probably very slightly) less power than the correct octane, simply due to the slower burn rate. Back to the KDX. In the woods, on a HOT summer day, in the wrong gear, motor lugging, me struggling (as I so often do ;) ) I prefere the higher octane safety margin the 91 provides. 1/2 HP be damned, I want to make it back to the truck. :cool: [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
93 octane.....pros vs cons?
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