Mixing Gas

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Mixing Gas

by Patrick Tenorio
(29 Palms, CA, United States)

I have a 1998 Kawasaki KX250 2-stroke. This bike is a beast and I love it.

But the thing is... can somebody make a 2-stroke motor to where you do not have to put pre-mix in the gas?

Patrick Tenorio

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Mixing Gas

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Jun 12, 2011
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Used To Be Common
by: banjoone

My 1975 Suzuki tm 250 two-stroke has what Suzuki referred to as CCI. Basically it consisted of a Mikuni pump that fed the two stroke oil through 2 pieces of high pressure plastic tubing. One to the piston the other to the bearings. You pour straight gas in the tank. Oil goes in a tank behind the right side # plate. Several company's did this in the seventies and it worked well. Unfortunately I don't think anyone has done this in about thirty years.

May 12, 2011
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It's Been Done On Large Engines
by: Anonymous

There is only one way to obtain a wet sump two stroke and that is to use a supercharger, as used in the most fuel efficient reciprocating engines in container ships (supercharged two stroke diesels) and various other trucks and buses over the years.

There would then be no need for petrol/oil mix or indeed oil injection and the bottom end could be much the same as a four stroke. You would however need the supercharger instead of crank compression which would ad cost, weight and absorb some power. And the problems associated with burned out rings would remain, as I believe it's a result of passing over the ports that screws em.

Apr 15, 2011
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Fuel Mix
by: Anonymous

As far as I see it, it could easily be done. All you would have to do is give it direct head injection which then gives you the ability to give it a wet sump which removes the need for fuel mixing since the reason they do it is to lubricate the crank.

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Mixing Gas