N15

I have a 1966 N15cs. Has been running fine but recently it has started misfiring when hot and is very difficult to start when warm. It has a refurbished magneto and a mikuni VM34 carb. I have replaced the cap condenser as fitted by Paul Wolf which has helped with the misfiring but it is a bugg*r to start when warm, ok when it cools down. Any ideas.
Cheers
Giles

Air leak at the manifold flange, and/or a HT lead with a core break or connection fault. Plug caps should be of the non-suppressed type. The HT lead should be of the copper type.

- Knut