2014 Aprilia Tuono V4R ABS Review

Dyno results are from Gene’s Speed Shop in Torrance, California, which uses a Factory dyno instead of the more common Dynojet brand. It’s equipped with an electric motor which can place additional load on the engine beyond what can be provided via a simpler heavy drum that makes calculations based on inertia, supposedly resulting in more accurate results. The two traces here show both loaded and unloaded runs. Dynojet dynos are far more prevalent than Factory dynos, and most of them (and the ones we use) don’t have the electric resistance.