The A-Z of Classic Vintage Motorcycles

The A-Z of Motorcycles
The virtual encyclopaedia of motorcycles? The virtual Tragatsch? The virtual museum of motorcycles? This is just an honest attempt at a listing of all motorcycles to share with all motorcyclists...

Lots of interesting history here - learn about thousands of different bikes - just click on any letter of the alphabet.
Hope it brings back some great memories!

acotrel said:

I often wondered why it had two exhaust valves instead of two inlet valves.

Click to expand...

It is my understanding the reason for 2 exhaust valve is due to the metallurgy of the time. Heat was/is a great enemy of valve springs. By using 2 exhaust valves the springs would be stressed less and they would last longer. It wasn't for performance rather for durability.