Search results
Results from the WOW.Com Content Network
Motorsport engines often run on high-octane petrol and can therefore use higher compression ratios. 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.
A motorcycle transmission is a transmission created specifically for motorcycle applications. They may also be found in use on other light vehicles such as motor tricycles and quadbikes, go-karts, offroad buggies, auto rickshaws, mowers, and other utility vehicles, microcars, and even some superlight racing cars.
With power typically being the product of force and speed, a motorcycle's power and torque ratings will be highly indicative of its performance. Reported numbers for power and torque may however vary from one source to another due to inconsistencies in how testing equipment is calibrated, the method of using that equipment, the conditions during the test, and particularly the location that ...
The rotational speed of the wheels for that given forward speed is simple to calculate, being the tire circumference multiplied by the RPM. [a] As the tire RPM at maximum speed is not the same as the engine RPM at that power, a transmission is used with a gear ratio to convert one to the other. [b]
The only application currently commercialized is the internally geared bicycle hub. The NuVinci CVT replaces derailleurs and other internally geared hubs, and provides a gear ratio range of about 350%, similar to that on bicycles with 8- or 9-speed hub gears, or with double chain rings (most racing or fast road bicycles). [12]
The designation of wide versus close ratio affected the lowest gear ratio; [7] for example, the four-speed Muncie transmissions offered in General Motors performance vehicles included the M20 "wide ratio" transmission, which had a first gear ratio of 2.52 or 2.56:1, while the M21 and M22 "close ratio" transmissions had a first gear ratio of 2. ...
At the start of a race it takes between one and two seconds for the motorcycle to reach the "curve speed" (somewhat lower than the average), which is roughly estimated to be the equivalent of 2.5 to 3 seconds to reach 100 kilometres per hour (62 mph) (or 0 to 60 mph). The start of the race is an important aspect of the race overall.
In developing countries where typical motorcycles are 125–150 cc (7.6–9.2 cu in) displacement, the larger 249.5 cc (15.23 cu in) CBR250R is at the higher end of the sport bike range, [10] looking similar to much more powerful sporting machines with its full fairing in Honda's new layered style that was introduced on the 2008 CBR1000RR Fireblade and 2010 VFR1200F.