 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
YSR FUEL |
|
|
|
(Just quick notes...I will try to expand on this topic later.) |
|
|
|
I was told that pre-mixing gasoline is better than the stock oil injector that comes on the bike. You can't rely on the injector to distribute the oil properly. Obviously the only advantage of keeping it on the bike would be if you rode it around town on a regular basis and need to stop at the local gas station. My bike came with one but my brother Joe yanked it out for me. It is not a requirement to remove it for racing, but a must because the oil injector creates a drag on the motor. Everything helps if you plan on racing. |
|
|
|
Pre-mix Oil |
|
|
|
If you remove your oil pump then you have to mix your gas with 2-stroke oil before you put it in the tank. The standard pre-mix ratio is 32 to 1 or 4oz of pre-mix oil to 1 gallon of gasoline. I like to you Yamalube 2R. It cost about $5-$7 and makes about 4 gallons of gas. Another big plus in YSR racing: you will probably go through a gallon of gas on race day if you only compete in a few classes.
TIP: If you want when you are fine tuning your motor and find out you are running a little bit rich but don't have the correct Jet size to correct it then you can �lean� out your mixture by adding more pre-mix oil to your gas. And vise-versa if you are running to lean then put less pre-mix oil. Remember to check your plugs if you are going to experiment with the ratios. On the safe side always run 32:1 ratio using pump gas. |
|
|
|
FAQ: Pump or Race Gas? |
|
|
|
Pump Gas |
|
|
|
You can use this for the track, however the additive, MTBE (methyl tertiary-butyl ether) in pump gas (according to our track promoter) supposedly eats asphalt! If you happen to crash (at Prairie City) and your gasoline leaks on the track then make sure to let the corner officials know so they can throw an agent to neutralize it. The only reason I use pump gas is because it's cheaper than race gas.
Use the highest-octane Shell or Chevron pump gas available--91 in California. Don�t go any higher because it will make your engine overheat and work against you. I�ve been told that tuners strive to maximize the most HP using the lowest octane possible. Low octane burns better. Even though these are �race� bikes their engines are based on street 50cc engines and have low compression engines; hence the need for lower octane gasoline. |
|
|
|
Race Gas |
|
|
|
VP Racing (quality fuels and lubricants) is one of the sponsors at Prairie City. I tried a few gallons of 92 octane and found it did not make a difference in power. (Should it have??? I don�t know.) I'm guessing it probably mixes better than pump gas because it has no additives. |
|