what is the benefit of having the swingarm attach on only one side? how come the cbr's arent like that?
you mean Single Sided Swingarm,
A single-sided swingarm
is a type of swingarm which lies along only one side of the rear wheel, allowing the rear wheel to be mounted like a car wheel (unlike the conventional motorcycle double-sided swingarm). Single-sided swingarms are traditionally found on small motorcycles or scooters
, where a robust chain case doubles as the swingarm linking the engine and rear wheel. Single-sided swingarms need to be much stiffer than the double-sided versions, to accommodate the extra torsional forces, and as a result, they are usually heavier than double-sided arms. Having a single mounting point guarantees proper wheel alignment.[citation needed
Single-sided swingarms date from at least the late 1940s. In 1948 the Imme R100
produced by Norbert Riedel of Germany had both a single-sided front wheel suspension as well as a single-sided rear swingarm that doubled as the exhaust pipe.
Later in 1950, Moto Guzzi introduced the Galetto, a large-wheel step-through scooter. In 1980, BMW
introduced its first single-sided swingarm on the R80G/S
, the "Mono-lever", which was superseded by the "Para-lever" used currently. Honda
currently features this style of swingarm on the Honda VFR
has created several models featuring these swingarms, most notably the Massimo Tamburini
-designed 916 series
. While they abandoned this style for the 999
, they returned to it for the 1098
superbike in 2007, and it survives in the current Ducati 1199
and 848evo. The Triumph Sprint ST
also features a single-sided swingarm.
The advantages of single-sided swingarms are (i) that it simplifies rear-wheel removal, which now involves merely undoing perhaps a single nut and then pulling the wheel off the axle shaft. Also, (ii) (on a non-shaft drive bike) a single-sided swingarm can enable the rear chain sprocket to be separate from the wheel itself. This feature allows a full-enclosed oil-bath final-drive chain, but whereas scooters have always used this advantage, large motorcycles rarely do, even though their chains would benefit from such protection. A further advantage, (iii) is that a single-sided swingarm gives a fashionable "clean" appearance to the bike's rear.
most famous SSS Honda