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1980 Honda XR 500A. Introduced in 1979, the twin-shock Honda XR 500 was the first "XR" model. The engine was a four-stroke, four-valve OHC, 497 cc (30.3 cu in) "Pentroof" engine. The bike had a conventional 18" rear wheel but an unusual 23" front wheel which was supposed to be better for riding over potholes and ruts.
With modern synthetic oils and new tests such as BMW's LL ("long life") oil specifications, most current cars can go over 6,000 miles (9,700 km) before needing an oil change. Even most modern conventional oils (also called mineral oils) can take a car engine at least 5,000 miles (8,000 km) before needing an oil change. [1] [2] [3] [4]
However, they still fill up with particulate matter, although the matter better suspends within the oil, [citation needed] and the oil filter still fills and clogs up over time. So periodic oil and filter changes should still be done with synthetic oil, but some synthetic oil suppliers suggest that the intervals between oil changes can be ...
The Honda Motor Company of Japan released the Honda Express (NC50) to the North American market in 1977. This new bike was designed to enter the large market for scooters that developed following the 1973 oil crisis. As such it came with a fuel-efficient single-cylinder two-stroke engine. It was also designed to be simple to operate, as many ...
The changes between 1996 and 2004 consisted of decal updates, the mechanical parts being identical. The XR250R was discontinued after 2004. In Australia a XR250Y was released with upside-down forks and electric start in 05–06. The 1991 Honda XR250L is the most sold of the entire XR series with more than 814,000 units being sold.
The Honda XR600R was an offroad dual-sport motorcycle powered by an air-cooled single cylinder, four-stroke engine, manufactured by Honda from 1985 to 2000, and is part of the Honda XR series. The currently available road oriented XR650L model is similar to the XR600R with an engine of more displacement but lower compression and less horsepower.
Controlling PM in this range of operation presents fundamental technical challenges which we believe can not be overcome in the 2004 time frame. Specifically, the cylinder pressures created under these high speed and low load conditions are often insufficient to prevent lube oil from being ingested into the combustion chamber.
The Honda 70 (later rebadged as the Honda CD70) is a four stroke motorcycle produced by Honda of Japan from 1970 to 1991. Production moved to Atlas Honda of Pakistan, in 1991. Introduced to compete against rival two-stroke small capacity motorcycles, the Honda 70 had a Four stroke engine with a displacement of 72 cc (4.4 cu in).