Excess kurtosis reaches the minimum possible value (for any distribution) when the probability density function has two spikes at each end: it is bi- peaky with nothing in between them.
The lower-powered engine arrived in 1972; with milder cams and lowered compression it gave up some peak power and torque, while allowing for a less peaky delivery and higher drivability.
Combined with a fierce fuel injection management mapping system, the bike tended to have a peaky response.
At this stage the engines were developing more than 500 hp, touching 600 hp, albeit with a very peaky power curve.
They praised its smooth ride and extra power, but criticized its peaky power delivery, vague shifter and interior ambience.
The engine torque band is not particularly peaky and timing it takes to hit 70km/hmi/h 0 is good.
The benefit to this was in traction, allowing the tires to adhere between pulses, rather than spin because of the two-stroke 500s peaky powerband.
The sound quality of the original recording has been described as disappointingly woolly, with incidents of peaky distortion from the piano microphone.
