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Anyone on here running High octane gas, (vp , cam 2) I've seen it around and at a local automotive shop in 5 gal jugs. just curious whats everyone's thoughts...
 

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Ummmm.... yes your engine loves the stuff. I use 4 gallons of non ethanol premium to one gallon of leaded 110 octane and I'm off like a rocket. Best to feed your bike a regular diet of good fuel. Not sure what usage and bike you are interested in feeding but unless you have a catalytic converter on it, your bike (whatever it is) will love leaded race fuel. It's very expensive and does not have to run straight to get benefits of lead. Mixing leaded with unleaded will raise octane rating and give benefits of lead to entire batch of fuel. Best to be consistent with your fueling. Dont switch back and forth. Tune for your fueling preference and stick to it. Don't expect race fuel to hit like a nitrous shot, but it's better for everything that your motor likes.
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Looking at your earlier posts I assume this is for the 150 2 stroke. We have only run 2 stroke KTM's for the last 12 years. We have gone through the grades and are now in seniors. We ride a 150sx. When racing 125sx bikes we did some testing and compared 98 octane pump gas to 110 octane Aviation Fuel (AvGas).

Here in short the differences:
  • Pump fuel in New Zealand come in 3 octane levels: 91, 95 and 98 octane (we do not use fuel that has ethanol mixed in).
  • Before we tested the AvGas we had tried with all three pump ones. 98 worked best as it allowed us to set the motor ignition timing a fraction earlier allowing for more fuel burn and less pre-ignition (Ping-ing).
  • We then tested straight AvGas and could set the timing earlier without any Ping-ing. This gave us an advantage in clearly noticeable more bottom end power, and we raced with 110 Octane AvGas for 2 years. Then after some discussion (with other riders and on here) we went to 50/50 98 and AvGas. Reason was that we could then get the best of both worlds: We had led in the fuel, still high octane (close to 105 octane) and we could leave the timing early. As the 98 fuel burns faster than 110 octane we also got some more bang for our buck increasing the explosion. We still have to test with 95 and 91 octane.
  • We never did any jet adjustments or anything else for the new mix. Any jet changes always had to do with elevation and temperature on the days we ride.
Hope that helps.
 

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Discussion Starter #4
Looking at your earlier posts I assume this is for the 150 2 stroke. We have only run 2 stroke KTM's for the last 12 years. We have gone through the grades and are now in seniors. We ride a 150sx. When racing 125sx bikes we did some testing and compared 98 octane pump gas to 110 octane Aviation Fuel (AvGas).

Here is short the differences:
  • Pump fuel in New Zealand come in 3 octane levels: 91, 95 and 98 octane (we do not use fuel that has ethanol mixed in).
  • Before we tested the AvGas we had tried with all three pump ones. 98 worked best as it allowed us to set the motor ignition timing a fraction earlier allowing for more fuel burn and less pre-ignition (Ping-ing).
  • We then tested straight AvGas and could set the timing earlier without any Ping-ing. This gave us an advantage in clearly noticeable more bottom end power, and we raced with 110 Octane AvGas for 2 years. Then after some discussion (with other riders and on here) we went to 50/50 98 and AvGas. Reason was that we could then get the best of both worlds: We had led in the fuel, still high octane (close to 105 octane) and we could leave the timing early. As the 98 fuel burns faster than 110 octane we also got some more bang for our buck increasing the explosion. We still have to test with 95 and 91 octane.
  • We never did any jet adjustments or anything else for the new mix. Any jet changes always had to do with elevation and temperature on the days we ride.
Hope that helps.


Yes, it sure did help.... Thank you Axzon
 
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