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Posted: Thu Jan 08, 2009 4:19 pm
by Dac
Kenny_McCormic wrote:Noting wrong with that much oil all you gotta do is install a bigger jet to let the gas displaced by the oil through.

If you look at people SERIOUS about making power(2 stroke kart racers) they run unbelievable oil mixes (usually 16:1 or fatter) given some of this has to do with turning 15,000 RPM but the dyno doesn't lie.

A man named Gordon Jennings did A LOT of scientific study on the 2 stroke motor back in the 70s. This is what he found out about oil, more oil=more power and CLEANER INTERNALS. http://edj.net/2stroke/jennings/oilpremix.pdf

http://edj.net/2stroke/jennings/ read it ALL, the 2 stroke motor really is misunderstood even today, blame the EPA and California.
i just went to a go kart racing place to buy oil less then a week ago, they said they run like 40:1. The people who run 16:1 and fatter (like out on the go kart racing circuit) rebuild there engine before every race and they use that much oil to seat the rings fast. The motor life on those are like 20 hours at best.
I talked with the guy for a good 20 minutes about oil and oil mixture. He was saying on customers Karts or avg. karts they would use 40:1. * the bottle of oil i bought from the place said to premix at 50:1 right on the d*** thing.

I did read the first article you linked about premixing and i got to say it was very interesting. I have not had the time to read the hole book yet. And i dont plan on reading it online, i plan to buy a copy of the book myself.

You also have to remember that in the 70's there was no injectors and 2 stroke oil was very basic. New modern oils (the good ones, not that gas station s***) is not meant to be ran as thick.

There is no need to run that much oil dude. Just jet the d*** thing properly and use 40:1. *, ill even agree with 32:1 because i believe thats running a lot, but not to much. But anything 25:1 or fatter, thats just crazy.

IMO anyway...

Posted: Thu Jan 08, 2009 4:23 pm
by Dac
Oh and remember, this is a discussion not an argument.

just reminding everybody...

Posted: Thu Jan 08, 2009 4:35 pm
by Kenny_McCormic
What the * class were they running in? A BOX STOCK, Yamaha KT100 is recommended to run 20:1 and that's with the chainsaw style exhaust and such. the 2 cycle section at www.4cycle.com, paints a different story than what you were told. just look for the word oil in titles, nobody runs less than 20:1.

Im not sure about the 2 stroke oil, but 4 stroke oil has been going down hill in its ability to lubricate high demand stuff for quite a while, something to do with reduced zinc content not keeping up with flat tappet cam engines.
http://www.hotrod.com/techarticles/engi ... index.html

Noise

Posted: Thu Jan 08, 2009 10:46 pm
by Spetrodc
One other thing. I don't know if it did it before I changed the final gearing but with the bike on the stand, if I spin the rear wheel, it spins freely but makes a faint grinding sound. At least it sounds like grinding to me but very subtle.

I cleaned the case out with a clean rag before reassembling the axle and wheel and the countershaft. Does anyone know if the wheel should spin silently like the front wheel or if a little noise (from the gears maybe) is normal? Like I said, I didn't take notice before I swapped out the gears.

Posted: Thu Jan 08, 2009 11:17 pm
by Kenny_McCormic
Might be a rear end bearing.

Gear Noise

Posted: Thu Jan 08, 2009 11:19 pm
by Wheelman-111
Greetings:

A little noise is normal, as long as the wheel spins freely - no "catches". Did you remember to pour 3 oz. of 40 weight in there?

Posted: Fri Jan 09, 2009 8:15 am
by Spetrodc
Yeah, I used a little bottle that looks like those old ketchup or mustard bottles with the pointed top to squeeze it in the drain hole until it was overflowing, waited for it to finish dripping and sealed it up. Used 10W-40 as per the manual but am considering 90W gear oil. Opinions welcome. I think there was gear oil in there because it was dark black and stunk to high heaven.

Gear Oil Stink

Posted: Fri Jan 09, 2009 9:15 am
by Wheelman-111
Greetings:

Yup, that sounds like Diff oil alright! :) An unmistakable fragrance. Mennen should bottle the stuff for after-shave.

I think you could pour Fleischman's Organic Corn Oil in there and it would still work fiine. I used a straight 40 Wt. Pennzoil because I had the dregs of a quart lying around that was useless for anything else. No problems -yet - but it is hot most of the time here in Deepinnaharta. It's usually best to go with Honda-san's prescription.