Mixing 2-Stroke Gas Made Easy
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- Опубліковано 10 бер 2023
- Today we walk you through mixing gas for your two-stroke. We also talk about different levels of octane you can use for your bike and how much fuel to mix up at one time.
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#yamaha #YZ250 #yzfamily - Розваги
Makes me excited that VP is working on something new for the two strokes 👌🏼. Love these segments Clark. 👍🏼
I find that increasing the BTUs per pound is better than actually using higher octane gas. I started experimenting in 1992. Using regular pump gas in my race bikes. A mix ratio of about 12% to 15% percent of aromatics; toluene or xylene with a slight bit of methanol or denatured alcohol for stability. Basically I was mixing approximately a half gallon to 4 gallons of gas. The fuel mixture is denser, which burns hotter, creating more BTUs which results in more power and less pre detonation.
Love the content man love the two stroke content especially I got a 01 yz 250 and I love it. Keep up the good work and it would be awesome to see some of your riding footage
Love this channel ! Keep it going !
Another great video from Jay! The formula for mixing gas to get an octane number is:
( [ % Fuel A ] x [ Octane of Fuel A ] ) + ( [ % Fuel B ] x [ Octane of Fuel B ] ) = Octane of Mixture
Here’s an example. Let’s say you mix 3 gallons of 110 with 2 gallons of 100 and you want to know the octane of the resulting 5 gallon mixture.
The percentage of 110 in the mix is 3/5 = 0.60 (60%).
The percentage of the 100 octane fuel in the mix is 2/5 = 0.40 ( 40%).
Plugging the information into the equation:
(0.60 x 110) + (0.40 x 100) = 66 + 40 = 106
A good number I like to shoot for is 93 octane. It’s important if available to use ethanol free gas as ethanol has less energy per volume. 89 ethanol free mixed with a 110 leaded fuel like Sunoco standard or C12 is a good every day riding mixture. Works in the 125 RM and a high compression 250f. More isn’t always better.
In addition to increasing octane the selected C12 “race” gas has a specific gravity. That plays a role in jetting for carbureted bikes. It effects how the fuel gets picked up through the jets. Specific gravity also plays a role in burn rate. 2 strokes can benefit from a lower specific gravity number for high burn rate and complete combustion. There are different additives to get octane. Additives such as lead or MMT contribute to increasing octane as well as higher refinement of base petroleum. This is my limited knowledge on fuels and just my 2 pennies. Oxygenated fuels are another topic altogether.
C12 and klotz smells awesome 💨
I have those gas tanks. They make some cheap tube benders that keep the clear tube bent making filling your bike, or anything for that matter, much easier!!
Yea these are great, I got one from Iron Pony and they really make a difference!! :)
2-Strokes rule. Epic video
Thanks for the tips 👍
Depends on how hard you ride as well, if you are a track star on the pipe, you can run a high flash point pre mix like R50. if you do more trail riding, I would run a Maxima K2 or AMSOIL Dominator which has a much lower flash point. When I run track I use Klotx 110 with Castor 927, when I run single track I run half non ethanol pump and 110 mixed with K2. I have an 09 yz250 with almost zero internal engine wear.
Best advice here. Way better than using no gloves and putting your hand in it!
Thanks for sharing! best I can get gas wise where I am is 91 no ethanol. What oil would you mix with that for track riding? yz125
@@ryanshout8652 Castor 927, or Klotz Super techniplate.
I run 2- 5 gallon metal gas cans. At home I dump a half gallon of klotz hitrate octane booster in each. Next i put in my Amsoil dominator at 44:1. I then drive to the store and put in 4.5 gallons of 91 non-ethanol, "premium rec. gas" here in MN. I use the pump to tell me I put in the right amount of gas in each can. Now I have decent quality 100 octane at a fair price to go in my stock 21' yz250x. In the metal cans it lasts longer. I always out of habit shake the can before I pour gas in my bike. If I had a higher performance bike or motor I would probably run vp.
Other points to add are the flash point of the oil for lower engine temp trail riding and certain natural oils like Castor 927 will separate with AvGas.
Nice tips -thanks!
Thanks Jay!
Man that thing sounds good!
I just bought a gallon sized jug that is marked and mix my gas 1 gal at a time vs. trusting the marking on the fuel jug, plus I'm always adding fuel to a jug that already has fuel in it. A lot easier than having to break out the calculator and guestimate on the decimal portion. Measure the gas, measure the oil in the ratio rite, then pour gas in the raio rite and pour back into the gas measure jug, then dump the whole thing in the gas can. Every bike gets is own can, and the only gas that gets put into the 2 stroke's can is pre-mixed so no chance of forgetting to add the oil.
Exactly. 1 gas can per bike esp if use different ratios etc. Always did that in Ole days. Ratio Rite mixing cups are quite exact. Use fresh fuel. If fuel gets old put in a vehicle to burn it/or lawnmower. -Ohio
In Australia we have 98 octane from Shell service stations. That's the only fuel I'll use.
Nice. Highest we have here in Ohio 🇺🇸 is 93. I buy 5gal cans Sunoco Optima 100 octane unleaded & mix w/pump 93. Use that in both 2-stroke Suzuki RMs & 2 Yamaha sport quads. Also in my '24 Ranger Raptor 😉
@@Davido50 the higher octane is also higher density so it has more legs
Good idea to change your float to copper or brass,puts tiny holes 🕳️ n plastic float
Great simple explanation on the mixing I always add just a bit more oil for 32:1
It never hurts never fouled a plug as long as you stay in the pipe but I always carry an extra and wrench in small back pack if my son and I are riding trails
What do you guys recommend for a good break in procedure on a fresh 2stroke 85 or 112 ?? I use 16:1 mix for break in
Do you heat cycle, half throttle etc??
Btw that 250 sounds like a rrriiiipppeerrrr
Im lucky I get leaded cam2 at the pump and use amsoil dominator from ace. Makes a nice cherry purple
I ran the recommended 30:1 on my 2022 YZ250 and fouled a lot of plugs. I think I will be mixing 40:1 from now on, thanks! 30:1 would probably be good if I was racing my bike on a track running the engine hard.
Plug fouling and excess oil out of the exhaust is mostly related to poor jetting.
For 30 some years I have went with 128 oz to a gallon so divide 128 and your ratio 128 divide 32 equals 4 so 4 oz to every gallon 128 divide by 40 equals 3.2 oz to a gallon etc.etc
Hey Jay I have a off topic question for you. I have a 2004 RMZ 250 with a Athena 270 Big Bore a Carrillo forged high-compression piston and Rod and a pro circuit 496 exhaust. I was wanting to get hotcams for it. I was wondering what would be a better choice for my riding I ride trails and a lot of sand pits with big hill climbs. And is it possible to just buy either intake or exhaust instead of both to save money. And if I can use just one which one would give me a better power gain intake or exhaust. Any information will be greatly appreciated
I been doing trail riding on my KTM 125 SX 2022 and I been using pump gas 91 and mix at 40:1 with motorex oil should I change the ratio or keep it the same because in the manual said to mix at 40:1 and I been using that since I started riding my bike ?
More important question, how the hell did you pour from the VP can without spilling it? I wish they had vents like sunoco cans. VP's quick spout is about as stiff as a board, which doesn't make it much easier.
Hey jay, can you do a video talking about avgas? I have watched your videos for a while, and hear you say “avgas” every once in a while. I recently found out what it means, and I have an airport that sells 100LL avgas. I’m considering using it straight in our YZ’s or maybe 50/50? If you could do a video explaining some benefits to using this fuel that would be much appreciated! Thank you
Clear/white cans show premixed oil color. My 2 stroke oils have plenty of coloring
what ratio should i run on a 1971 ke 125 2 stroke with carb and should gas line have a fuel filter on it or no cause doesnt oil get caught in gas line filter i re building this bike
What would you do for a 2002 CR 250R - I’m in Canada I usually use 94 octane which is the highest quality gas. If I’m on the track what would you use
I have a 08 ktm 65 sx and i rev it up now and then what ratio should i use
I have a 2024 ktm 250 sx. What gas and mixture should I run? Thank u
Can I add additives in my gas mix like b12, seafood, tuneup in a bottle?
The dealer told me to run 32:1 on my new yz250, any reason why you guys run it leaner?
I have a question about oil what would be better semi synthetic or fully synthetic or does it matter
Pick your favorite oil pick your desired ratio use the highest octane fuel you can get out of the pump, jet your bike to that specific ratio and you'll have no problems.
Pro tip a 12 oz gatorade bottle filled to the brim gives you a perfect 50 to 1 into 5 gallons of gas it's been 25 years I own a landscaping business I've never blown anything up
Ratios are not by engine size, it's by factory specs. Check your owners manual if you don't know. And if you want to be a smart guy and decide you want more oil thinking it will lube the engine better, you better realize that means leaner fuel and you'll need to run bigger jets to do so.
The best way to mix 2 stroke fuel is to have a common mix for all your bikes . A pint of oil to 4 gallons of gas gives you 32 to 1 which works well for all bikes. If I am mixing bean oil for alchohol motors I mix two pints to five gallons for 20to one . If you have a lot of bikes or if you do long race weekends, the just having a can for the weekend works better than mixing two cans at a time. Also steel cans are much better for gas than plastic. I would only use plastic for alchohll.
If i ride on the street what should be my ratio? Inride 85lw and 125 need some help
Can I use the same vp fuel your using for my ktm 150 sx
It's even easier if you use metric system.10 liters is 10000 milliliters, 10000 divided by 32 is 312.5 so add about 310-315 milliliters of oil to the 10 liters of gas. I use a dollar store measure cup. Simple
Have you ever used the VP T2 premix? Results?
Does it damage a 2-stroke engine to shut off the fuel and run it til the engine stops?
Try putting the flashlight in the top of the jug
I have a question. Amsoil says to mix there Dominator oil at 50:1 what are your thoughts? I have always been a race gas 32:1.
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Both gas and oil composition’s have changed since 1980; and I imagine that has effected the oil recommendation’s of the day. What would be the recommended for oil to be run in a freshly rebuild Yamaha MX175?
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Great info Jay. I’ve been using VP110 and ethanol free super unleaded in a 50/50 mix @ 60:1 with 6 gallons and Bel Ray MC1 in my 97 YZ285 big bore kit for years. After rides I put the mixed fuel into an empty VP metal gas can. My local farm feed store has ethanol free and VP110 at the pump. What’s the difference between 110 and C12 ?
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So what about 91 ethanol free with Stabil added? says it should be good for at least 6 months.
Always smoke a camel no filter when you're pouring gas, safety last, old school stuff 😉
Don’t forget an ice cold longneck too 🍺
Should the mix ratio change when switching from pump gas to race gas? If so, by how much?
For 250 & 300 2 strokes…
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question I live in Pennsylvania we can still buy 89 octane ethanol free at the pump. Can you get that in California? Or would it be better for me to use VP fuel for my 2 Stroke bike.
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Use T2. Best switch I've ever made. Instant 2 HP upgrade. No more mixing.
Not enough octane for a full mod.
@@a_drewski 105 octane isn't enough? Horsecrap. I have a heavily ported engine (former Team ECC race bike). Bud racing head. Full fmf..
@@jpesicka999 run whatever you wanna run. My engine builder recommended c12 with a compression ratio of 13.5:1 and timing advanced a few degrees.
@@a_drewski the reason he recommended C12 isn't just because it's more octane. It has something in it that gives the engine a cooling effect compared to a VP110. He's right tho C12 is really good stuff. I just like T2 because it's premixed and it's 5% oxygenated so it gives it a noticeable boost in performance.
I have a 2021 yz85 and I run my gf bike on 40:1 mixed half half with 93 pump and sunoco 110 leaded race fuel is this a ok mix ? We started mixing it 35:1 but is this ok to mix these two fuels ?
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I have a Yamaha that I’ve been running the same carb settings same spark plug same 50:1 ratio same gas same oil for a year and she’s tan krispyyyyy. Out of no where I fouled a plug. By fould I mean the plug is rich rich. I installed a new plug and fouled 3rd ride. I removed carb and cleaned throughly and even jetted down and inspected reeds. Ran good for a day then back to the same symptom of fouling. I’ve gone back to the ORIGINAL plug and cleaned it and it’s the only one that won’t foul? What gives? I even went back to the same setting I had when it ran krispy. Now she sounds fouled all the time. Compression is at 220 .
50:1 too much need to run 32:1
this was ez??? lol my kx80 was 32-1 does that sound right?
What does a yz85 use??
Is avgas oxygenated requiring different jetting like people say
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ive nvr seen that brown/red oil always seen bluish
Divide fuel volume by the ratio you need. EZPZ.
Why does one need to do this? Could someone pls explain me
Can you run 40.1 on a yz125?!?
Can you tell me the ratio you use on the KTM 300 pls. Never used Klotz but interested
All depends. Email Jay direct for more tech
60:1 and dont use that trash Klotz oil unless it's MX only.
I want to run race gas on my 250 4 stroke what should I be looking for?
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Im getting a 2006 ktm 65 sx and it says it uses a 1:60 fuel ratio but i feel like thats realy low
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I never have run VP race gas in a bike but always run 91/92 now days. Is this a problem? I'm not fast by any means and started riding in 84. Never had a problem and have been 32:1 the entire time. I see a lot of these videos championing race gas, which is twice as expensive as the high octane pump gas. Now with that said I just got my kid a 2022 YZ125. Am I still good to run the high end pump gas in that thing or did I just buy a money pit?
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1-50 2% good for yz250 ?
I don’t understand why people mix the race gas with pump gas? To bring the octane down a bit? I always just run straight VP110
Bc if you don’t have a high compression motor your just wasting your money on race gas. Only purpose for it in a stock bike is it’s ethanol free and better quality.
What about non ethanol?
I give mine 3 shakes any more is considered that your playing with it
C12 vs t2 what better .for two stroke
T2 for a stockish motor. C12 for a full mod.
Wear some gloves guys, the amount of lead in avgas and c12 is insane.
Didn’t you hear, gloves are for Nancy’s
@@BooZoo24 that’s an L take buddy. I run leaded fuel in all of my bikes but I’m not going to intentionally soak my hands in cancer causing chemicals.
I drink that shit daily
Maybe just not wear your purse
Okay
Ok first tip I need …..how the hell do I stop spilling it?….i get more in my toilet bowl waking up drunk on a Saturday morning !!!
how many thousands of times have I done that
Mixing gas and hauling ass 🤪✅💙🤙👨🏼🦳💪
Why does everyone have different ratios for different brands?
Just like cars, different brand different engine. The correct gas to oil ratio is different for all engines.
Wash ur hand man. Good video.
Just put 150 ml an 5 litres of petrol
Benzene on the skin
Man that’s bad advise you’ve done a video on KTM and how the call for 60:1.
Why would you say any 125 at 32:1?
KTM bikes will run like crap with those high oil ratios. Most of them are 60:1
Run you manufacturers suggest oil ratio people and yes I’ve seen National level kids hold that bike wide open at 60:1 that’s what it’s meant to do!
So the ratio rite cup figures it all out for you. You made it so confusing with math formulas and theories. Wth
First of all buddy yiur mixture is way off the right mixture for your cr is 32.to 1 your way is way off start over a
at 32to 1 this us why your red and blue cr is bogging bad
And this is exactly why the other guy had bad bogging issues to wrong fuel mixture 32 to 1 is factory stick with this mixture it will fly agsin
It's a track bike not a bush bike fuel mixture must be set at factory mixture
No one cares about b.t.u factory settig is 32.to 1 end of story
You talk to much
I have a 0.8L gas tank can someone tell me how much petrol and 2 stroke gas I should use? (I’m using a kxd01 pro upgraded dirt bike)