MZ Yanmar Clone

[pietenpol2002]

Seeking some input from the Enfield aficionados on the board.

The links below are of a Yanmar clone fired MZ from the MZ board. Of particular interest is the means by which they mated the Enfield box to the clone. Noteworthy also is the belt drive primary. It would appear to make for a clean and compact power unit that could be dropped into any number of frames.. Is this a typical and familiar arrangement? And what do you suppose is the clutch/pulley arrangement? Interesting too how much of the engine/trans unit is hung from a light bracket bolted between the head and trans.

Most of the pics are found well down page 2.

http://mz-forum.com/viewtopic.php?f=60&t=15420&start=50

Full thread begins on page 1.

http://mz-forum.com/viewtopic.php?f=60&t=15420

If the text is of interest and German isn't your native tongue, simply use the Google translator option, however I've occasionally had difficulty displaying pics via the translator.

Ron

[TedV]

It looks like a similar way of doing it, with seperate engine and transmission for those that don't do the CVT driveline. Don't have time to do the translation right now, and the most German I remember is "Nicht verstadt" or something like that...

do they clarify in the thread what pulleys and belt they use?

[Sphere]

This is a typical arrangement for anything mated to an Enfield gearbox. I have been looking at beltdrive, but I was unsure the clutch would survive long and pressfitting a pulley over de clutchhousing isn't exactly something you can do without proper tools, and a good deal of workmanship.

What is your question about the clutch/pulley arrangement?

[mgraeme]

Folks, I think I've found a video of this bike:

http://www.youtube.com/watch?v=wMdGPsWS ... re=related

[andrewaust]

Folks, I think I've found a video of this bike:

http://www.youtube.com/watch?v=wMdGPsWS ... re=related

That's the one


A

[pietenpol2002]

"What is your question about the clutch/pulley arrangement?"


I was just curious how the pulley is mated to the Enfield clutch that is designed for a sprocket. Also, it seems that in most other applications the Enfield box is secured independent of the engine and coupled to the engine only by way of the primary cover, whereas in this instance it's bolted directly to the engine (if I'm viewing it correctly). I do wonder about the rather severe angle to which the belt is subjected by the tensioner. It would seem that such rapid reversals might generate heat over time.

Cheers,
Ron

[Stuart]

Talking of MZ Yanmars...Brian Rutherford just sent me a few shots of the bike he's just finished. This bike is CVT though. I'll post to the main site when I can.

[arnaud]

I like it, especially the taxi-yellow.
It begs for an mz sidecar in the same colour!

[cumorglas]

"What is your question about the clutch/pulley arrangement?"


I was just curious how the pulley is mated to the Enfield clutch that is designed for a sprocket. Also, it seems that in most other applications the Enfield box is secured independent of the engine and coupled to the engine only by way of the primary cover, whereas in this instance it's bolted directly to the engine (if I'm viewing it correctly). I do wonder about the rather severe angle to which the belt is subjected by the tensioner. It would seem that such rapid reversals might generate heat over time.

Cheers,
Ron

i don't know about an enfield clutch but on the kaw clutch i am doing it was pretty straightforward. drill out three pins holding sprocket onto basket. get chunk of alu into lathe make pulley. find three appropriate size pins/rivets. peen pulley onto basket. realize the real reason you wanted enfield tranny was for kickstarter. realize you hate kickstarting bikes. get comet 40 back off shelf.

about the belt tensioner, look at modern serpentine belts. the goal there is for every pulley to have as much wrap as possible. the trick is not to use a pulley of smaller diameter than belt is designed for.