Sachs motor kit

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This is the Sachs-engined Mongoose comfort bike I commute on. Sachs sold off it's division that makes this kit, a German bike company called Hudson now manufactures it, and there is a Taiwanese clone (many parts are interchangeable) called pro-Rotary. It complies with restrictions that apply in Europe, Australia, and I believe Canada, that primarily dictate 200W max output, which is about what an average person can produce. But as we all know, not all the time! 200W gets you about 30km/h.
 

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Free Wheel

It seems obvious, but I have to ask, is it possible to ride free-wheel?

From what I see, if one does not wish to free wheel, this might be "the" best engine yet.

Out of way, small, enough speed, simple.

I like it very much.
 
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Hey Zumer,

I've been playing with these little Sachs engines and actually have a couple. The old ones with the head and cyl together, airplane style I understand were made by Moto Morrini in Italy for Sachs. These are really sweet. It has the decompression valve and everything.

My wife liked my bicycle so much she wanted one, so I got a new engine from Sachs, before they went bankrupt, and this one was the Chinese built one with the separate head. It doesn't run nearly as well, so I swapped the carb and ignition module, no change. It is noisier and slower. Do you know if this is normal?

Oh, a little insight into the engine, Sachs has built models of these beginning in the 30's, but went bankrupt last year. There was a cash infusion from a Chinese company and now Sachs is back. During the bankruptcy, the Dutch importer and Hudson somehow managed to get the rights for the engine and the Saxonette name. Sachs now has virtually the same bike that they renamed the "little Saxy".
 
original saxonette kit

hope you don't mind me posting pics of my original 1930s sachs saxonette kit.i do have a more modern restricted one with a dodgy automatic clutch which tends to stick.
 

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Wow!

Amazing! And equally amazing the thing was not melted down...!

Will have to check the moped in my garage. If it is a Sachs, might have another project in the future.
 
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hope you don't mind me posting pics of my original 1930s sachs saxonette kit.i do have a more modern restricted one with a dodgy automatic clutch which tends to stick.

That's amazing alright, - I didn't realise that the design was so old. :eek:
 
Hey Luke,

Very cool engine, has a nice early German look to it, kind of a art nouvieu thing going. I would love to see one running with the old engine.

I know a little about the automatic clutch on the new Saxonette engine, they are very clever, the clutch is actually in the crankcase. This way the intake from the carb cools the clutch and helps to keep it from overheating. I don't have a good answer to why it is grabbing. The simple things to look at are your idle speed being too high and possibly your two stroke oil. You might be able to get a better take up with a synthetic, they lubricate better so may give you a little more slip and maybe a little better for the engine.

Oh, got news that the Dutch importer (Brittijn) got upset with Hudson because of supply issues. They have suspended their agreement. These engines are apparently very difficult to get right now. Take very good care of your Saxonette.
 
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