Why do 2 stroke motors run different ratio's of oil in the fuel mix

ride65 · #1 10-06-2009, 10:04 AM

Some 16:1 40:1 50:1 depending one the motor. what is the reason for some to need a richer mix then others?

bandito · #2 10-06-2009, 10:30 AM

It seems to me the oil ratio mix is in direct proportion to the owners ego!

donuts31 · #3 10-06-2009, 10:38 AM

Ignorance by both manufacturer and owner.

**BarelyAWake** · #4 10-06-2009, 10:45 AM

Well, if yer talking about different brands and type of motors than just our chinagirls - much of the variance in manufacturer's recommendations has to do with that specific engine's machining tolerances, operating RPM range, and application.

If yer askin' bout just our lil bike motors - depends on what the owner is willing to experiment with. The manufacturer's "16:1 & 20:1" recommendations for our bike may in fact include the possibility of using standard (read low-grade) motor oil instead of 2 cycle, but these are sloppy lil motors that may or may not need a lil extra lube... but therein lurks a debate lol

I'm quite happy running 36:1 with Amsoil's synthetic "50:1" but some are of course running the 100:1 stuff at various ratios... it's up to you

Venice Motor Bikes · #5 10-06-2009, 11:34 AM

I use regular 2-cycle oil, & break in the engine with 24:1 mix. After the break in, I use 32:1.

**Bikeguy Joe** · #6 10-06-2009, 05:18 PM

Venice got those instructions from me.

xlite · #7 10-07-2009, 10:11 AM

Quote:

Originally Posted by ride65

Some 16:1 40:1 50:1 depending one the motor. what is the reason for some to need a richer mix then others?

Environmentally conscious individuals will use 50:1 or synthetic 100:1. Others need to leave a trail behind so they won't get lost so use more oil.

FYI more oil in the gas results in a leaner mixture, not richer.

FlyJSH · #8 10-07-2009, 10:18 AM

So what is the correct ratio if I use Crisco?

**BarelyAWake** · #9 10-07-2009, 10:19 AM

1:1

I wanna see pics tho o.o

**Bikeguy Joe** · #10 10-07-2009, 10:20 AM

Quote:

Originally Posted by xlite

Environmentally conscious individuals will use 50:1 or synthetic 100:1. Others need to leave a trail behind so they won't get lost so use more oil.

FYI more oil in the gas results in a leaner mixture, not richer.

I believe the OP meant richer as in "oil to gasoline".

But, yes think about it....at 32:1 you have twice as much gasoline running through the jet than you do at 16:1.

In honesty, I run 40:1 any more since all my other "goodies" run that mix.

I have recommended 24:1 in the past because I have had a couple of Big Name sellers ask me to refrain from suggesting anything but 16:1 or 20:1 for warranty reasons, so that is sort of a compromise.

So, for the record, run whatever you are comfortable running, and live with the concequences.