Video

DYNO VIDEO: 2016 Yamaha SR400

Retro thumper spins the drum on the Cycle World dyno.

December 10, 2015

Kickstarting the Yamaha SR400 is a great deal of the personal pleasure and interaction derived from this 399cc four-stroke single. The start routine is aided by a bar-mount compression release, sight window for finding the sweet spot past TDC and modern fuel-injection—it all conspires to make for easy assisted living with Yamaha’s retro-inspired thumper. There is lots of flywheel effect felt on the road, and power comes in early, making for easy launches. The torque curve reveals a midrange lull that lend a sense of command and control but run up near redline the engine provides good acceleration.

SPECIFICATIONS
\|2016 Yamaha SR400
ENGINE TYPE\|air-cooled four-stroke single, SOHC; 2 valves
DISPLACEMENT\|399cc
FUEL DELIVERY\|Fuel Injection
TRANSMISSION\|5-speed; multi-plate wet clutch
FINAL DRIVE\|O-ring chain
FRONT BRAKES\|Hydraulic single disc brake, 298mm
REAR BRAKES\|150mm drum
WHEELBASE\|55.5 in.
SEAT HEIGHT\|30.9 in.
FUEL CAPACITY\|3.2 gal.
WET WEIGHT\|384 lb.