Wanting an opinion from the big dogs to see if I should break in my rings with 20:1 or the normal 35:1? Thanks Blaster bro's.B)
Miss type. I ment 32:1. Lol.
Miss type. I ment 32:1. Lol.
Last edited:
Break in pre mix ratio.
- Thread starter blasterdemon7
- Start date
Blaner
Your Friendly South African Ambassador
some same use the same/normal mix, some say richen it up a little if you do you must remember to jet accordingly (increase jet size) and then rejet again when you change to your normal ratio. this is because with more oil, your fuel becomes more viscous and a bigger jet is needed to pass the same amount of fuel as with a leaner fuel/oil mix
Blaner
Your Friendly South African Ambassador
Blaner
Your Friendly South African Ambassador
Blaner
Your Friendly South African Ambassador
I have always thought that when you have more gas that is richer and more oil is leaner. Am I wrong? Or just over thinking?
Thanks everone. I was asking because I read a post somewhere on here about using 20:1 for break in. I just wanted to double check the info before I did it..
You can break in whatever ratio you want, assuming you have your machine jetted for that ratio and the ratio can handle the oiling needs of the engine.
20:1 in theory provides MORE lubrication, which in theory will make your rings and parts not seat in as quickly.
I myself will be breaking my top end in soon and I have no intention of changing my mix ratio for the breakin. 32:1 it will be.
And edit for Slick, youre right Slick. The terms Rich and Lean get tossed around with gas/oil ratios and its not really correct. The more gasoline is in your mixture, technically, the RICHER your machine is going to run. The more oil you have in there, the less space for gasoline to take up, and the LEANER it will run.
20:1 in theory provides MORE lubrication, which in theory will make your rings and parts not seat in as quickly.
I myself will be breaking my top end in soon and I have no intention of changing my mix ratio for the breakin. 32:1 it will be.
And edit for Slick, youre right Slick. The terms Rich and Lean get tossed around with gas/oil ratios and its not really correct. The more gasoline is in your mixture, technically, the RICHER your machine is going to run. The more oil you have in there, the less space for gasoline to take up, and the LEANER it will run.
Blaner
Your Friendly South African Ambassador
i think the confusion comes in with the 2 types of rich/leaness i like to think of it as two seperate entities, your fuel/oil ratio and then once that is set, your fuel/air ratio. what you are talking about Luni is the latter. less oil in your gas makes your fuel/oil ration LEANER but overall it makes your fuel/air ratio RICHER as the fuel is less vicous and can be atomised better with the air and pass thru jets easier.
In theory it would, but Bridgestone did a test on a Suzuki 250cc 2 stroke engine, and they broke it in with the oil they ran (they ran 3 different mixtures, new piston and rings each time), and the higher oil ratio, the more power it made.
It also ended up being a cleaner motor the more oil they ran. The only down side is it fouled the spark plugs worse, the more oil they ran. They tested 32:1, 20:1 and 12:1 I believe.
However, their test was ran with castor oil. So, you cant compare that test to some of the other oils people run, but for sure, on castor based oils, the more oil you run in your gas, the more power youll make, and the cleaner your engine will be.
At least, thats what I got out of the test.
Im sure the test is running around on here somewhere, but if you cant find it, let me know and Ill see if I can find it for you.
http://www.blasterforum.com/engine-13/pre-mix-ratios-myth-facts-read-14935/
Wondered when someone would mention that thread. In the factory owners manual for a Banshee (1987 model) they recomend 20:1 for break-in, 24:1 after. My 250 Elsinore runs 20:1. Considering plugs and oil are easier and cheaper than pistons and cranks, I'll continue to run 28:1 thank you. I love the smell of bean oil I:I
BTW, how many of you have ACTUALLY read all of that thread???:-/
Wondered when someone would mention that thread. In the factory owners manual for a Banshee (1987 model) they recomend 20:1 for break-in, 24:1 after. My 250 Elsinore runs 20:1. Considering plugs and oil are easier and cheaper than pistons and cranks, I'll continue to run 28:1 thank you. I love the smell of bean oil I:I
BTW, how many of you have ACTUALLY read all of that thread???:-/
