Extreme AIRHEAD pics thread

[RGregor]

Originally Posted by Airhead Wrangler

I have trouble figuring out how they're driving those overhead cams. Must be a bunch of bevel gears involved there as well as an additional shaft over the crank to drive them? Lots of effort there. Anyone know who made these?

Hi!

The engine in the top image is a bevel drive conversion designed by Ludwig Apfelbeck in the 70ies. It has conventional valve springs.
The bottom image is the first engine made by Franz Pohn.
It has bevel drive and desmodromic 2V heads.
He later built an 4V desmodromic engine based on the R100R and a desmodromic head for the R1100.

Greetings, Rudi

[gspell68]

Originally Posted by P B G

Of which there are multiple...

...or even a Brough Dream or Golden Dream if you wanna stick to airhead designs!

[gspell68]

Originally Posted by RGregor

Hi!

The engine in the top image is a bevel drive conversion designed by Ludwig Apfelbeck in the 70ies. It has conventional valve springs.
The bottom image is the first engine made by Franz Pohn.
It has bevel drive and desmodromic 2V heads.
He later built an 4V desmodromic engine based on the R100R and a desmodromic head for the R1100.

Greetings, Rudi

No doubt, a similar design to the Kawasaki W650...

[gspell68]

I kinda like this one...



Video of it on the street here...
http://www.youtube.com/watch?v=gStKmR3M124

[Airhead Wrangler]

Originally Posted by gspell68

No doubt, a similar design to the Kawasaki W650...

Uh, no. More like a 70s ducati. The kwackers don't have desmodromic valves and the fact that they use bevel shafts to run the cam is just kind of a rip off of older bevel drive ducatis. Associating bevel drive cams with kawasaki is like associating ketchup with kirkland signature. Yes, they make it, but if you ask most people who makes ketchup they'll probably say Heinz.

I found a few more photos showing some innards:













It looks like mostly ducati parts with some homemade stuff. German shed tinkerers definitely are a level beyond the rest of the world's shed tinkerers.