Dang, bummer Scott! Thought Colombo was coming around somewhat, but you did everything possible and in the realm of mortalism to get and keep it going. Good job on that!
Joe, I don't know two strokes much, so 6.7:1 may be the equivalent of a higher compression 4 stroke. Even at that, CR is part of what defines the gas you need and then combustion chamber shape and elevation the bike runs at, etc enter in.
My V-Strom 1000 had an 11.3:1 CR and only called for regular gas. My Honda ST1300 had a 10.8:1 CR and needed premium based on manufacturers recommendation.
With the ZRX1200, it has a 10.0:1 CR and runs on the Kawasaki recommended regular gas without a hitch.
The XS is a 9.0:1 CR, so running premium in it is spending more for as than a person needs to, unless engine mods have been done that call for higher octane.
It's kinda funny that folks get bent out of shape over what oil to use in the engine or middle/final drive, and when someone uses oil outside what Yamaha recomended 35+ years ago, the mantra comes back time and time again "Yamaha knows best or they wouldn't have spec'd that weight oil".
Well folks, Yamaha didn't recommend premium for their bike...
Joe, I don't know two strokes much, so 6.7:1 may be the equivalent of a higher compression 4 stroke. Even at that, CR is part of what defines the gas you need and then combustion chamber shape and elevation the bike runs at, etc enter in.
My V-Strom 1000 had an 11.3:1 CR and only called for regular gas. My Honda ST1300 had a 10.8:1 CR and needed premium based on manufacturers recommendation.
With the ZRX1200, it has a 10.0:1 CR and runs on the Kawasaki recommended regular gas without a hitch.
The XS is a 9.0:1 CR, so running premium in it is spending more for as than a person needs to, unless engine mods have been done that call for higher octane.
It's kinda funny that folks get bent out of shape over what oil to use in the engine or middle/final drive, and when someone uses oil outside what Yamaha recomended 35+ years ago, the mantra comes back time and time again "Yamaha knows best or they wouldn't have spec'd that weight oil".
Well folks, Yamaha didn't recommend premium for their bike...
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