Adareacs

Update on my last post, we have solved the problem about it not revving up turned out to be the ignition coil, it was not producing a good spark fitted a replacement coil all ok now sounds sweet as a nut.

Thanks for the info much appreciated.

I'm helping a friend of mine to rebuild his Ossa mar we have got to the point of starting it but even though it fires up ok it refuses to rev up, we have the correct needle and jet in the Amal carb but as the throttle is opened it just seems to spit out fuel from the carb and doesn't rev up. The timing is set at approx. 3.5mm btdc and the bottom end has been rebuild by an old school motor bike engineer are we missing something obvious ? Any help would be appreciated.