* Ariel 500: Out in Africa, Steve Wilson meets all manner of other old bike riders as his travels take him through South Africa, Botswana and Zambia, clocking up the miles aboard his idiosyncratic Ariel

* BSA Unit Singles: The last shout of BSA's single cylinder 250s and 500s came in unit construction form, including the Starfire and B44; the oil-in-frame B50s and T25s. Author Matthew Vale explains the range and their development and suggests some useful upgrades

* 1966 Lambretta SX200: In a slight deviation from our normal subject matter, Colin Sparrow takes a look at the scooter scene and one 1966 example in particular

* 1965 Moto Morini Tresette Sprint: Morini are more famous for their twins, but Roland Brown romped off on this 175c single. Next stop, Moto Giro?

* MZ ETZ 250 Rebuild: Can you strip and rebuild an old bike for under £100? You certainly can if it's an MZ, and here's the proof...

* 1971 Norton Commando Rebuild, Part One: Matthew Vale starts work on a 750 Commando which has just come back to Blighty from the States, complete with ape hangers...

* 1939 Sunbeam B24 350: Built by AMC at Plumstead, this girder-forked 'high cam' single was in production for mere months. Frank Westworth is intrigued by its engineering and wonders why it fell from favour so fast

* 1971 Triumph T100C: Original and unrestored, this high-pipe 500 twin is a firm favourite among owners who swear it's a better bike than those commonplace 650s...

Plus: We see how Norton brochures have changed over the decades, go electric racing at the TT, meet lots of RC riders taking up the Norton Challenge, consider whether a Vincent Shadow could indeed out-pace a Jag XK120, while Frank Westworth struggles to get his Matchless G12 ready for this summer's Jampot Rally