Triumph guides
Triumph pre-unit twins and Bonneville unit-construction twin
Five Triumph guides covering the full classic era. The pre-unit twins (5T Speed Twin / T100 Tiger / TR5 Trophy / TR6 Trophy / T110 Tiger, 1937-1959) running BTH magdyno electrics, the unit-construction Bonneville T120 family (T120R / T120T / T120C, 1963-1972) — the long-tram 9.5:1 71 mm bore x 82 mm stroke mode that crossed the pre-1969 Lucas E3L dynamo chassis into the 1969-on Lucas RM15 alternator + WIPAC diode-board chassis — the unit-construction Bonneville twin (1963-1979) transitioning to Lucas alternator charging, and the two short-tram Bonneville variants -- the N1 (1969, 8.5:1 compression) and S1 (1970, 9.5:1) -- each shipped with a 30+ page restoration doc, a printable PDF, BTH / Lucas wiring diagrams, and the model-specific tool list a solo restorer actually needs.
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Yamaha XS650 Restoration Guide
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BSA Gold Star Restoration Guide
BSA DOHC single-cylinder (1938-1963) -- DBD34 rigid-rear (1938-1948), YA / ZA / ZA-B Golden Flash plunger-rear (1949-1958), DBD34GS Clubman swinging-arm (1956-1962), 1959 Catalina scrambler with Lucas RM13 alternator + negative-earth switchover, and B50SS Clubman continuation (1961-1963). DOHC shim-under-bucket wedge spec (I 0.10 / E 0.15 mm), BTH fotQ versus Lucas W2 / W3 stand-alone magneto split, and the 1956 swinging-arm chassis pivot.
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Norton Commando Restoration Guide
Norton Commando 750 / 850 unit-construction parallel twin (1967-1977). Isolastic cradle cradle bolt torque bands (Mk1 22-27 N.m single-layer vs Mk2 / Mk3 30-35 N.m sandwich-mount), Atlas-style gearbox retrieval end-float (mainshaft 0.10-0.20 mm / layshaft 0.05-0.15 mm), 12-step factory reassembly sequence from engagement cover through tank, MA12 / RM15 charging crossover at the 1971 Lucar transition, and the Lucas Rita SSI twin-spark aftermarket retrofit for the Mk3 850.
Open the Norton Commando Restoration Guide