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Steamer: You've made some good points there. Making a doubly supported output shaft should be straightforward and very worthwhile. Valve train should/will be enclosed. That Nemitt engine *really* looks the part, since it already has that. Along the same lines, it has that copper tube running...

I'm not familiar with the "tiny Bosch injector". The injector we, and a lot of other teams, use is a Keihin injector that flows around 33 cc/minute. This does work for the power ranges that we're looking at, but at fairly low duty cycle. I've built an experimental injector based on that one...

Hrm, seems like some pretty harsh language being used. I think you should re-read my post, and pay attention to the language. It's quite clear that I am asking if it is indeed "taboo" to ask for that set of plans, considering they are not even available for purchase. I didn't ask for someone...

Yes, I do know that. But EFI system is completely done already, as a separate thing. That is, the pressure source, low flow injectors, electronics, code, etc, is already done. That's the easy part. Now, as far as a desmodromic valve configuration and such, that was just a pipe dream suggestion...

Ha, yeah. Although, I don't need the integral transmission. It's really just the head. Doing the cam geometry should be pretty straightforward in Mathematica, but it's all the small parts ... the springs, washers, bumpers, seals, etc. Hence the hunt for an existing design, so I could build and...

Sure you can ask. I'd like to put together an engine platform for a student high mileage vehicle competition. That is, the engine will actually be used to provide traction power to a lightweight "vehicle (pretty much an aluminum ladder with wheels on it). A lot of engines in this application are...

Hrm, interesting. There's so many stories of these old guys making this amazing stuff, and by the time I've learned about it, they've passed on. A guy names Henry Parohl made a Wankel style rotary engine that I'd *love* to build, but unfortunately, there were no plans for it. Oh well. So, would...

That Nemitt engine does look fairly neat, I'll have to email the guy to ask about getting plans... I think desmo valves would probably be *super* difficult to get working. I've heard that getting them dialed in on a real bike is hard enough, so coupling that with designing & manufacturing them...

Hey folks. I am currently hunting around for plans for a small engine to build, something 4-stroke, air cooled, gasoline fueled, ring seals, and as many ball/needle bearings as possible. Something around 35-50 cc's would be great, but I should be able to scale to that fairly easily. And as far...