Maintenance & Technical > KX500 Original
Interesting read
doordie:
E.G talket about... "with two spark plugs at 90 degrees to each other, positioned over the transfer ports and angled towards the intake side of the cylinder."
Already done on sidecarsengine for years with 500++cc.... 8-)
Larry Wiechman:
--- Quote from: Motorrad on January 02, 2011, 03:00:27 PM ---Short but interesting what gorr was saying. Especially about devoul's bike
http://www.dirtrider.net/forums3/showthread.php?t=31667
--- End quote ---
Wow, small world. That was me (LJW), second guessing Kawasaki's cylinderhead design. I didn't like it 9 years ago, and I still don't.
Larry
Motorrad:
I was more interested in Devols bike with the "resonators"... Have been trying to find a picture of it.. but cant....
The dual plug idea is a nifty one... what did they do for ignition?
Larry Wiechman:
--- Quote from: Motorrad on January 03, 2011, 02:12:42 PM ---I was more interested in Devols bike with the "resonators"... Have been trying to find a picture of it.. but cant....
The dual plug idea is a nifty one... what did they do for ignition?
--- End quote ---
I believe the model airplane pipes on the Devol bike was just for bling. I've never seen it myself, but Eric mentions it everytime the conversation turns to KX500's. Must have been cool, because it made quite an impression on him.
I was hot to put a dual plug coil from a snowmobile on a bike. What I didn't like about the sled coils, was the fact that they fired one plug with correct polarity, the other reverse polarity. The energy jumps from the center electrode to the ground strap on the first plug. Then the energy conducts through the cylinder head, plug shell and ground strap before arcing back to the center electrode of the second plug. A$$ backwards and requires a lot more energy. The inline 4 cylinder road bikes use the same scheme to fire cylinder pairs 1&3 and 2&4 together. I set my '75 900 Z1 up with one automotive coil per plug and was very happy with the results. The new coil on plug technology would be cool to try on a KX if you had enough space to fit it on the bike without relocating things like pipes and tanks. Hard to find room for 2 plugs the way it is now.
Larry
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