Would this be legal? twin cylinder 250

[Out of Order]

First I can't imagine the general public ever buying into adding oil every month or so,

[grumpy]

Oil injection always requires less oil than premix and in many ways is vastly superior to premixing. If a car were built using a 2 stroke, I'm pretty sure oil injection would be used instead of premix. So then you just one more fluid reservoir to fill - just like wiper fluid, brake fluid, tranny fluid, differential gear oil, engine oil, gas, etc...

[Helmut Clasen]

Oil injection always requires less oil than premix and in many ways is vastly superior to premixing. If a car were built using a 2 stroke, I'm pretty sure oil injection would be used instead of premix. So then you just one more fluid reservoir to fill - just like wiper fluid, brake fluid, tranny fluid, differential gear oil, engine oil, gas, etc...

Why are you using less oil in a oil injection system???
 

[grumpy]

Let me first say that this is oil injection (an old precise method of getting oil to the main bearings) I'm talking about and not direct injection. Oil injection systems inject oil directly to the main bearings bypassing the need to mix the oil with fuel. They get what they need and that's it. All the old 2 strokes used to be oil injection and though it's been a long time, so I can't quote any sites for info, I believe I recall the more precise oil injection used less oil in comparison to premix. Premix was another fad that came along, I don't believe it actually has any true benefit but marketing has a tendency to lead the way. Granted I may have some of my facts wrong, so I would welcome any corrections. But then I look at it this way, even if the same amount of oil is required with oil injection you still have a non-diluted oil reaching the bearings and for the purpose of use in an automobile it sure would be a lot simpler for the end consumer to just fill a container of oil vs. trying to determine a proper ratio of premix in their 25 gallon tank that they just wanted to top off. But it would be fun to shake your car each time you add oil, lol.

[grumpy]

Here's some info, albeit basic, from Rotax on 2 stroke aircraft engines.

http://www.rotaxservice.com/rotax_tips/rotax_oil_injection.htm

I think it would be interesting to see what is written on the topic that is not just conjecture & opinion as I see a lot of people who prefer to convert their oil injection systems to premix. But then again, I think marketing has a lot to do with as it does with the latest 4 strokes are better crap. I mean who wants to do oil injection when the top race MX bikes are premix. Then again I think (opinion & conjecture coming) steel frames are superior to alloy frames and I think 2 strokes are superior to 4 strokes and I think oil injection is superior to premix.

[metal_miracle]

some other dual cylinder motocross

[Out of Order]

I love the little CZ 125 engine, that would make a good road racer if it was legal to use in 125GP. The rotax 250 on the other hand was not my favorite at all. I just don't like the design for some odd reason. I know the first rotax 250's had cooling and detonation issues, because of how the cooling system was run through the engine. That CZ on the other hand, I don't know much about.