Yamaha R25 Dyno Test: So Many Horses Does it Actually Produce at the Rear Wheel?

An Indonesian company by the name of Ultraspeed Racing hooked up the recently launched Yamaha R25 on to a chassis dynamometer (a sort of treadmill for vehicles) and came out with some rather interesting figures. The online motorcycle magazine iwanbanaran.com from the same country has published the outcome of the dyno tests on the R25 and here is the lowdown.


While the advertised power figure for the R25 is about 36 PS, the dyno test revealed that the power reaching the rear wheel of the R25 is around 32 Whp (Wheel horsepower). The wheel horsepower is generally considered as the effective or true horsepower of a vehicle while tested on a chassis dynamometer.

In this test the dyno calculates the power applied by the test vehicle on the rolling road. Since this is the amount of power available to the rider or driver in real life situation, it is widely held to be more practical and informative. Do not get startled by this, as this is applicable to all bikes and cars on the roads today. There is a definite power loss when it reaches the rear wheel.


R25 against New CBR250R, Ninja 250 and RR Mono

The boys at Ultraspeed Racing also did a comparison test involving the immediate challengers that the R25 face in their country. This is what they found out:

  1. Honda CBR250 new 2014: 26 Whp
  2. Kawasaki Ninja 250FI: 28 Whp
  3. Kawasaki RR Mono: 26 Whp
  4. Yamaha YZF R25: 32 Whp

If you had been harboring doubts about the performance of the all new R25, lay them to rest. The twin cylinders rule. Period.

How I wish they had a dynamometer to gauge precisely the ‘looks’ of a bike! If they had, the Yamaha R25 might have had a butterfly or two in its stomach and yes, I am Sufi 🙂

Check Out Complete coverage of Yamaha R25