JW Aspin Engine Archive

Meriden Triumph 650 parallel twin with variable valve timing

An A0 drawing by Aspin showing his 650 Triumph twin, plus detailed drawings by Triumph Meriden for crankcase fitment. Unbelievably I seem to have good quality drawings from Aspin on this engine, accompanied by a set of detailed drawings by the Meriden factory for the crankcases and timing side for the unit construction 650 Triumph
General arrangementGeneral arrangementHead
Drive-side crankcaseDrive-side crankcaseTiming-side crankcaseTiming-side crankcase
Cylinder blockCylinder blockCylinder blockCylinder block