Mk2 Carbs with Mikuni intake manifold

Has anyone ever used Mikuni intake manifolds with Amal Mk2 carbs? Were any jetting changes required? I know there will be limited clearance at the frame webbing area.

Id got ' U ' bends from H S White , and carefully cut the unsquashed ends tangental , so the curve was continuous at the interface .
This was worth 5.000 horsepower 1 . well , I figure two anyway , maybe a darn sight more when the pulse charge bits happening .

Originally , they were back behind ( almost ) the cross brace to the side tubes . The sucker who'd brazed the flanges & brass sleeves on
had put the adaptor sleeves for the carb rubbers slid on 1/8 rather than flush at the back end cut . So I had to have the choke levers off
for clearance of the cross brace . This isnt a good idea , you need the chokes . But its indicative of the positioning / curve for good
downdraft / gas flow , as the suckers cant go any higher standard . Ended up trimming them ( were 14. jet to valve face ) so the carbs
were just forward of the cross brace , or the intakes under & bodies up forward to clear the cross brace , cables tucked in & up the tunnel.

Was a relief to have chokes as could be reluctant to fire , cold , with none .

will pm you a rough pic where you can just deciper it . Id used 32s on the 750 .

Thanks for the info.

I have all the parts needed except cables and air cleaners. Maybe this will be a winter project.

I'm not looking for more HP. It ain't a race bike. I' currently run a single Mikuni and want to go back to duals because it looks cooler.

Any other suggestions or comments are welcome and appreciated.

stuck amals said:

Thanks for the info.

I have all the parts needed except cables and air cleaners. Maybe this will be a winter project.

I'm not looking for more HP. It ain't a race bike. I' currently run a single Mikuni and want to go back to duals because it looks cooler.

Any other suggestions or comments are welcome and appreciated.

Click to expand...

Hmmm, duals look cooler? So you want all the hassles of keeping those Amals working? Wouldn't trade the single Mikuni for nothing...except maybe fuel injection

If you look close in the photo on the pm , youll see its not a big fat one , but the rear one from that angle makes it look fat .

Dont think of it as Tuneing . Think of it as liberateing all the Horsepower in there waiting to get out .

Std cam & the MkIIs would pull from 800 rpm on up . Keeping two throttle cables adjusted can hardly be called a chore ,
and if no morons been at the there hardly more than that , for maintainance . Easyer the setting two sets of points , even .

Though if someone cant be trusted with that , I can see why you wouldnt let them have Two Carburators .
Perhaps they should only be allowed ONE Cylinder , or perhaps no cylinders at all , would be easiest .

Yes Dennis, I agree that a single, with an E.I. is the dependable way to go. I like the low RPM and smooth idling of a single.

I don't plan on changing those things on my "regular" Norton. But on my other Norton with the SS pipes, High Rider tank and the Fast Back tail fairing, I can put up with the extra hassle. Or I can just change it back.

Stuck there is no reason to go big A. duals here just to look cool ,no racing. Have a Maxwell house and rethink things.