MZ ETZ 250 Tuning

Derek Pickard looks at the stock MZ250 carb situation, tries the alternatives, finds what works and gives the details of how to make your ETZ run super sweet… Let’s start with a few hard facts: The BVF carb as fitted to the MZ two-strokes can only be considered ‘average’ in its metallurgy and machining. It is the main contributor to…

Tony Pearson's Approach

Decoking MZ and CZ Exhausts and Baffles How would you remove the carbon from an Eastern Bloc two-stroke exhaust? Two RealClassic readers explain how they tackle the task… In recent issues of RealClassic there has been some discussion about removing the baffles from an MZ silencer. I’ve owned and ridden MZs for around twenty years and I can tell you…

Torquing and Tightening

A combination of modern materials and time-honoured techniques can cause problems when it comes to assembling the bottom end of a classic British bike. RC readers debate the how and the why of it… In RC128, Ian Copcutt excellent article about rebuilding a Triumph triple showed how a micrometer is used to determine correct big end bolt stretch. This is…

Carb Balancing with Vacuum Gauges

Transform your juddering and shuddering classic bike into a smooth performer. Always a sucker for a workshop gadget, Martin Gelder presents a balanced approach to carburettor set-up using vacuum dial gauges… A set of carefully balanced carburettors can transform the way a bike rides. They can turn a shuddering and rattling monster into a smoothly humming wonder, and transform a…