Editing Anti-lock braking system (section)

===Combined Braking System (CBS)===
Contrary to how the wheels on cars and trains react collectively to brakes when applied, on motorcycles the rear wheel brake and front wheel brake are controlled separately. If the rider only brakes with one wheel, this braked wheel tends to lock up faster than if both brakes had been applied. A [[Combined braking system|Combined Braking System]] therefore distributes the brake force also to the non-braked wheel to lower the possibility of a lock-up, increase deceleration and reduce [[Suspension (motorcycle)|suspension]] pitch.

With a single [rear] CBS the brake pressure applied on the rear brake (pedal) is simultaneously distributed to the front wheel. A delay valve cuts the hydraulic pressure to assure that only when strong braking is applied, the pressure is also created at the front wheel. Honda's first street motorcycle with a combined braking system (then called Unified Braking) was the 1983 [[Gold Wing#GL1100|GL1100]]. This system was derived from the 1970s [[Honda RC series|RCB1000]] world endurance race bike.<ref>{{cite web|title=Advanced brake introduced for motorcycles by Honda ahead of others|url=http://world.honda.com/motorcycle-technology/brake/p2.html|work=Honda Worldwide|publisher=Honda Motor Co|access-date=July 9, 2018|archive-url=https://web.archive.org/web/20160310200739/http://world.honda.com/motorcycle-technology/brake/p2.html|archive-date=March 10, 2016|df=mdy-all}}</ref><ref>{{cite web|title=Combined Braking System (CBS)|url=http://powersports.honda.com/experience/articles/090111c08139be28.aspx|work=Honda Powersports|publisher=American Honda Motor Co|access-date=July 9, 2018|date=9 December 2013|archive-url=https://web.archive.org/web/20180710010624/http://powersports.honda.com/experience/articles/090111c08139be28.aspx|archive-date=10 July 2018}}</ref>

Larger models with two front [[Disc brake|discs]] use a dual CBS System. The system was first installed by Moto Guzzi in 1975.<ref>{{citation|title=Motorcycle Handling and Chassis Design: The Art and Science
|first=Tony |last=Foale|year=2006|pages=12–16|publisher=Tony Foale |edition=Second|isbn=8493328634|url=https://books.google.com/books?id=84hF-qoR5I8C}}</ref> Here, applied brake pressure at the front is also applied to the rear wheel and vice versa. If the front lever is applied, the pressure is built up at 4 of the 6 pots in the 2 calipers at the front. A secondary master cylinder at the front wheel distributes remaining pressure to the rear wheel through a proportional control valve and acts on 2 of the 3 calipers. If a strong brake force is applied at the rear wheel force is also distributed to 2 of the 6 pots of the front wheel. More modern dual CBS use front and rear calipers (and all pots) according to a preset load ratio of front to rear. The proportioning was originally controlled by complex all-hydraulic systems interlinking the front and rear, with a fixed delay or by sensing weight distribution changes. As early as 2001 an electrohydraulic system was introduced by BMW.<ref>{{citation |title= New integral ABS from BMW Motorrad |last1= Braunsperger |first1=M. |last2=Beulich |first2=S. |last3=Wagner |first3=HA |journal= ATZ Worldwide |year=2001 |volume= 103 |number= 5 |pages= 5–8 |doi= 10.1007/BF03226430}}</ref>