AJ565 wrote:
I run straight C12 in my bike. I've gotten bad pump race gas before and the bike ran like crap. I've tested 91 octane pump gas ...more
AJ565 wrote:
I run straight C12 in my bike. I've gotten bad pump race gas before and the bike ran like crap. I've tested 91 octane pump gas in shifter karts back to back with C12 and there was a noticeable power increase and the engine pulled harder out of corners. I'm not a fan of $85 for 5 gallons of C12, but I know its good gas and I get about 4 days worth of riding out of it.
Also, if you run pump gas be sure to get it from somewhere that goes through a high volume of fuel so its as fresh as you can get. Storing in plastic containers shortens the shelf life of fuel to about 2 weeks before it starts to degrade. If you do the black cans are best to help stop UV rays, which also degrade fuels.
If the engine does not require a fuel such as C12, you will LOSE power. The higher octane leaded fuels are used to prevent detonation in engines with high compression. Using a fuel such as C12 when only pump gas is required will result in an incomplete burn of the fuel, thus not burning all of the available oxygen. This theory that race fuel will give you more power in a stock engine is just not true. Oxygenated fuels, such as U4.4, will give you a noticeable increase in power and throttle response, but it is not due to the octane rating. It is merely due to the engine being able to burn more fuel as the gas itself is a carrier of more oxygen.
Mixing a stock two stroke 50/50 with C12 and pump is always a good idea for detonation protection. In the US our fuels are fairly inconsistent in quality. All of my mx bikes claim to only need 91 octane out of the box. On the east coast we have 93 octane at the pump...
Tomac and/or Anderson for 2020.....