What is a duolever front end?

Motorcycle Monthly - - News -

In terms of large mo­tor­cy­cles, this won’t be the first time that a Duolever has been used - although ar­guably the most fa­mous re­cent bike to use the sys­tem wasn’t a Honda but a BMW.

In 2004 BMW in­tro­duced duolever on the front of its first in­line-four sports tourer - the K1200S. Duolever is an evo­lu­tion of Nor­man Hos­sack’s dou­ble wish­bone / par­al­lel­o­gram sus­pen­sion, which is why its some­times re­ferred to as Hos­sack Sus­pen­sion.

The idea it­self has been around since Hos­sack mod­i­fied a Honda XL500 in 1979. In the early 90’s he mod­i­fied a BMW K100RS, and whilst it never re­ally caught on in Eng­land, Ger­man engi­neers un­der­stood the idea in­stantly. Like the rear par­alever, its ge­o­met­ri­cally a dou­ble wish­bone sys­tem. As with telelever, in duolever the piv­ot­ing links and springs are not steered. But with duolever, the phys­i­cal link from the han­dle­bars to the sus­pen­sion is rad­i­cally dif­fer­ent, in­volv­ing a hinged link.

The front sus­pen­sion is com­pletely in­de­pen­dent of the steer­ing, with the two only be­ing con­nected by the hinged link up top.

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