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9/19/2015 8:41am
I am looking to run my bike on race fuel,
Don't know alot about it so looking for some advice,
I have a 2011 ktm 150, it's only done about 10 hours it has a boyesen rad valve a full fmf factory exhaust system.
May possibly look to get it ported at some time in the future.
Advice please on what is the best fuel and should i mix it 50/50 with pump gas (we can get hold of 99 octane super unleaded straight from the garage here)
done basic research but what are the pro's and cons of using such fuel. Cost not counting as a con as i am aware of what it'll cost.
Advice would be greatly appreciated. Thanks in advance
Don't know alot about it so looking for some advice,
I have a 2011 ktm 150, it's only done about 10 hours it has a boyesen rad valve a full fmf factory exhaust system.
May possibly look to get it ported at some time in the future.
Advice please on what is the best fuel and should i mix it 50/50 with pump gas (we can get hold of 99 octane super unleaded straight from the garage here)
done basic research but what are the pro's and cons of using such fuel. Cost not counting as a con as i am aware of what it'll cost.
Advice would be greatly appreciated. Thanks in advance
If you switch from typical pump fuel to a typical race fuel, you'll have to lean your jetting a bit.
So jet for the fuel that you can get consistently and stick with that fuel. If you have to drive 2 hours to a special shop to get fuel, forget it. Find a consistent, convenient, local supply and jet for that fuel.
For me, money is an object that I like to keep around. I mix a 50/50 blend of Trick 114 (R+M/2) and ethanol - free pump fuel 92 octane (R+M/2). Running the race fuel straight doesn't seem to have much added benefit over the 50/50 mix in my stock 125 or even in my ported, high compression 300cc two stroke.
That unleded 99 octane you have locally should actually work great if it's a consistent fuel (Batch to batch) and if it doesn't have all the Ethanol that we are stuck with here in the USA. (Up to 10% ethanol in most areas). Ethanol kills carburetors because it attracts moisture. It also has less energy.
In a stock two stroke, anything more than 96 octane is really not necessary.
More compression needs more octane and/or less timing, but most full race 2-strokes only need around 100 octane, sometimes less.
Two strokes and leaded race fuel go together like two things that go really well together [Simile School].
Better: U4.4
Best: MRX02
The price tag more than doubles from good to best...
And just FYI, VPR IS T2... T2 is just a version that is already premixed.
The Shop
MRX02 will blow your mind... But it cost...a LOT. I think it was $140 for a 5-gallon pail last time i checked...or maybe that was mr12...i dont remember.
U4.4 is considerably cheaper at like $70 for 5 gallons. It's not quite as good as mrx02 but its marginal, unless you need the best of the best..I'd stick with u4.4
Never let u4.4 or mrx02 sit in the carb for any length of time...or you will be replacing all the rubber/ o-rings.
Every place wants me to have an aircraft present.
Pit Row
I used to buy it from the airport just outside of 29 Palms, CA when I was stationed on the Marine base there... That was back in 2006 - 2009. I can still get it at my local airport here in WA which happens to be on the same property as one of the local tracks. It really depends on the airport though.
Technically, they aren't supposed to sell it for motor vehicle use on the ground (aircraft only). The lead content and lack of road tax being charged are the primary reasons for that law...
If they hassle you, ask them "What if I own and Ultralight Aircraft and need some fuel for it?"
You can do a search and find the gate codes for almost every airport since private plane owners sometimes need to leave after standard business hours.
Many small airports close at 5. If you go after hours and you have the gate code, you can get the gas after hours.
Ours is a bit of a procedure as the pump is absolutely massive and will fill a 5 gallon can in about 6 seconds flat.
If it asks for a tail number, I just put in six X's (xxxxxx)
If you hear the pump spin up after clearing your credit card, but wont actually pump, go look for a control box with a on/off switch. Make sure to return it to the off position when you are done.
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