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A motorcyclist wearing helmet, gloves, boots and leathers slides along a racetrack after crashing Some riders neglect safety with other priorities in choosing what equipment to wear. To improve motorcycle safety, many countries mandate the wearing of personal protective equipment such as protective clothing and helmets.
Kerry S. Harris (born December 8, 1969) is an American entrepreneur and inventor.Harris is involved with [clarification needed] motorcycle helmets under the brand name Akuma Helmets utilizing his patented Integrated Power System.
A 2008 systematic study showed that helmets reduce the risk of head injury by around 69% and the risk of death by around 42%. [10]Although it was once speculated that wearing a motorcycle helmet increased neck and spinal injuries in a crash, recent evidence has shown the opposite to be the case: helmets protect against cervical spine injury.
The miles per gallon equivalent cost of an alternative fuel vehicle can be calculated by a simple formula to directly compare the MPG operating costs (rather than the energy consumption of MPGe [7]) with traditional vehicles since the cost of resources varies substantially from region to region.
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In December 2022, Motorcycle News reported on helmet manufacturer Airoh collaborating with Swedish safety firm Autoliv to produce an airbag-equipped helmet: "Airbag systems are nothing new in biking. Once a safety net reserved for the MotoGP elite, they’re now found in everything from standalone vests to adventure jackets, to bespoke leathers.
This was the first time an electric motorcycle was able to complete a Vetter Challenge with the liquid fuel bikes. At all other events, the electric motorcycles lacked range to complete the course with the group and were disqualified from winning the overall lowest fuel cost per mile. Hershner $.017/mile fuel cost Hayes $.023/mile fuel cost
For example, motorcycle racing engines can use compression ratios as high as 14.7:1, and it is common to find motorcycles with compression ratios above 12.0:1 designed for 95 or higher octane fuel. Ethanol and methanol can take significantly higher compression ratios than gasoline.