Buy some 10mm steel plate, find a lenght of pipe to match the mounts on the carbs and get a gasket to use as a template
Bike manifold1 by quickrack, on Flickr
Cut, drill, file, grind etc......
Bike carb measurements by quickrack, on Flickr
Bike carb flange by quickrack, on Flickr
Weld, grind, trial fit, weld, grind, trial fit.......
Bike carb manifold. by quickrack, on Flickr
Bike manifold4 by quickrack, on Flickr
Bike carb manifold tacked. by quickrack, on Flickr
Bike carb manifold tacked . by quickrack, on Flickr
40's off. These were borrowed. Thanks Noel.
DSC_0147 by quickrack, on Flickr
DSC_0146 by quickrack, on Flickr
Nearly there.
Also got switch, filter, pump, mounting kit etc
DSC_0082 by quickrack, on Flickr