Fuel Mixture gas to oil ratio

[carrot_top]

I know this question has probably been asked alot before, and i wish i didnt have to debase myself as to ask it..but due to the misplacement of the instruction manual that had came with my HT 80cc motor, i am at a loss as to what the gas to oil ratio that would be used once the motor has been broken in......sooo....

could anyone please tell me the gas to oil ratio's for the HT 80cc motor (for the post break in ratio and the break in ratio while your at it)?

(and if your wondering, yes i have tried searching....twice actually...i got nothing....)

 

[biken stins]

From a instruction sheet. New 16-to-1, 8oz to 1 gallon. Broke in 20-to-1, 6.4 oz to 1 gallon. May vary for a lot of reasons.

http://motoredbikes.com/showthread.php?t=7762&highlight=fuel+ratios

 

[Mountainman]

good sound information

From a instruction sheet. New 16-to-1, 8oz to 1 gallon. Broke in 20-to-1, 6.4 oz to 1 gallon. May vary for a lot of reasons.

http://motoredbikes.com/showthread.php?t=7762&highlight=fuel+ratios

this seems to come from some good sound information

why some wish to lean the heck out of there engines

I just don't know

ride that THING

 

[Pablo]

Those numbers look sort of OK for break-in with conventional oil. When broken in, and unless you are racing or it's 118°F something there is no need to go oil richer than 32:1 with a good oil in a HT engine.

 

[nickk]

oil to petrol mix

wouldn't go below 16:1 even if it means more plugs replaced
i ran mine at 20:1 and had a big end failure and it looks like lack of oil is the fault, plugs are cheap engines cost more
people from oil companys will tell you that you can run it down to 30:1 but when something goes wrong they dont have to pay for the damage or they change they opion and back pedal that they never said it
they show you all the **** under the sun that they are right
but i dont belive them i was running benol klotz oil and at 20:1
from a friend that runs it in gocarts with no problems
castrol 2t is what i'm running in the new engine at 16:1 and after its run in it will still be 16:1 as is my wife bike engine and my father inlaws

nick

 

[Pablo]

Everyone needs to run what they need to run. I'm not arguing.

If you had a crank failure at 20:1, it wasn't the oil ratio. That's plenty of oil. I've run for hours and hours at 40:1 FULL THROTTLE. NO issues. I'm not telling everyone to run at 40:1, I'm just saying there is no magic ratio. 32:1 is perfectly fine with a with a good oil in a broken-in HT engine. I think I would know by now if this wasn't working out. I've run 20:1, and that may be fine for a racing engine, but it's simply overrich oil in a HT engine...spewing all kinds of oil. It's a waste, and it's not that great for the environment.

 

[Skyliner70cc]

I agree 32:1 is ideal from day 1 and if you use Maxima 927 or any oil which is fortified by 10-20% castor, you will never have any worries and can even go up to 40 or 50:1

Most of the engine failures are component failure or poor quality control. Roller wrist pin bearings seem to be a weakpoint with a cage that disintegrates. No amount of oil will prevent this, particularly in roller beairings that can shift/slide to one side and almost half off putting an unusual load on the the bearing the remains in contact with the wrist pin forces.

 

[williamsk1936@yahoo.com]

If you will go to the Gru Bee website, you can download an assembly sheet like you lost. You want to mix 20:1 for the 1st gallon and 32:1 thereafter. Use ashless 2 cycle oil. If not it will whisker the plug. It is amazing how tiny the whisker is. You have a hard time seeing it. KW

 

[williamsk1936@yahoo.com]

If you run 20:1 you ARE running lean It AIN'T GASOLINE. 32:1 is aricher and with quality oil, adequate ratio As a matter of fact I think the instructions caution against wide open because of that.

 

[cooltoy]

20 parts gas to one part oil would be richer than 32 parts gas to one part oil but just to confuse everyone, try to read this,without getting a headache. There was one part that had me scratching my head, he said something about needing more air when using more oil.....
http://www.edj.net/2stroke/jennings/oilpremix.pdf

I myself use 2 oz of synthetic Amsoil per full tank and I always thought I was being nice to my motor.