
 Originally Posted by 
JDNSW
					 
				 
				The Zenith or indeed the Solex carburetter perform perfectly well on this engine, provided they are in reasonable condition. I have no experience with the Weber. The problem with a lot of old carburetters of any type is simply wear on the throttle shaft and bearings. This can be rebushed and the shaft replaced, and then fitted with an overhaul kit the carburetter will be as good as new in most cases. 
The Stromberg has often been fitted because of availability, but is unsuited to this application, as the mixture changes on slopes, causing either flooding or cutting out depending which way the track leans, so it is not a good idea if used off road.
I would simply fix the Zenith - if you are not able to do it yourself, there are still a few carburetter repair places about.
John
			
		 
	
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