Unless he pulled the engine and put it on and engine Dyno (lol not likely), then it is horsepower at the wheels. Hence the strapping of the bike down and spinning the roller with the rear tire.
Yea if it was on a roller it's wheel people always get that confused. You see a lot of people say the hp in the brochure is horsepower to the wheel an are but hurt when the dyno says otherwise
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