Fully adjustable motorcycle
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsKazumasa Nakaya, Ichiro Kurawaki, Toyoji Tanaka
Life of this patent
Estimating the term…
Abstract
Several embodiments of fully adjustable motorcycles so as to permit the use of a single motorcycle as either a touring or racing machine. The handlebar assembly is adjustable along an arc as are the foot pegs with the center of movement of the arc being midway disposed between the handlebar and the foot pegs. This permits the rider to assume either an upright touring position, or a reclined, crouched racing position. The seat is also adjustable and the adjustment further accommodates riders of varying stature.
Claims18
A motorcycle construction for permitting a rider to assume either a crouched, racing position or an upright touring position comprising a frame assembly journaling front and rear wheels, said front wheel being dirigibly supported by said frame assembly for steering of said motorcycle about a first axis, a handlebar assembly, supporting means supporting said handlebar assembly for pivotal movement about a second axis generally parallel to said first axis, means operatively connecting said handlebar assembly to said front wheel for steering of said front wheel about said first axis upon steering movement of said handlebar assembly about said second axis, means for mounting said supporting means for said handlebar assembly and said second axis for adjustment relative to said frame assembly generally within an arc about a third axis extending horizontally and transversely to said frame assembly and behind said first and second axis to a plurality of adjusted positions of said second axis and said handlebar assembly between a lowered, forward position for racing posture and an elevated rearward position for touring posture while maintaining said second axis in a generally upright condition for steering said front wheel in either position of said handlebar assembly and for locking of said handlebar supporting means in any of a plurality of adjusted positions about said third axis.
A motorcycle construction for permitting a rider to assume either a crouched, racing position or an upright touring position comprising a frame assembly journaling front and rear wheels, said front wheel being dirigibly supported by said frame assembly for steering of said motorcycle about a first axis, a handlebar assembly having a pair of handle grips supported at opposite sides thereof, supporting means supporting said handlebar assembly for pivotal movement about a second axis generally parallel to said first axis, means operatively connecting said handlebar assembly to said front wheel for steering of said front wheel about said first axis upon steering movement of said handlebar assembly about said second axis, a linkage assembly for mounting said supporting means for said handlebar assembly for movement relative to said frame assembly generally within an arc about a third axis extending horizontally and transversely to said frame assembly and behind said first and second axes between a lowered, forward position for racing posture and an elevated, rearward position for touring posture while maintaining said second axis in a generally upright condition for steering said front wheel in either position of said handlebar assembly, said linkage assembly including a first link pivotally connected at one end to said supporting means for the handlebar assembly and pivotally connected at its other end to said frame assembly and a second link angularly disposed to said first link and pivotally connected at one end thereof to said supporting means and at the other end thereof to said frame assembly, said links being adjustable in length for accommodating riders of different stature in either the touring or racing postures.
A motorcycle construction for permitting a rider to assume either a crouched, racing position or an upright touring position comprising a frame assembly journaling front and rear wheels, said front wheel being dirigibly supported by said frame assembly for steering of said motorcycle about a first axis, a handlebar assembly including a pair of handle grips supported at opposite sides thereof, supporting means supporting said handlebar assembly for pivotal movement about a second axis generally parallel to said first axis, means operatively connecting said handlebar assembly to said front wheel for steering of said front wheel about said first axis upon steering movement of said handlebar assembly about said second axis, means for mounting said supporting means for said handlebar assembly for adjustment relative to said frame assembly generally within an arc about a third axis extending horizontally and transversely to said frame assembly and behind said first and second axes to a plurality of adjusted positions between a lowered, forward position for racing posture and an elevated, rearward position for touring posture while maintaining said second axis in a generally upright condition for steering said front wheel in either position of said handlebar assembly and for locking of said handlebar supporting means in any of a plurality of adjusted positions about said third axis, said handle grips being adjustable relative to said handlebar assembly between a first position spaced closely adjacent the longitudinal center line of a motorcycle and a second position spaced outwardly therefrom.
A motorcycle construction for permitting a rider to assume either a crouched, racing position or an upright touring position comprising a frame assembly journaling front and rear wheels, said front wheel being dirigibly supported by said frame assembly for steering of said motorcycle, a handlebar assembly operatively connected to said front wheel for steering thereof, means for mounting said handlebar assembly for adjustment relative to said frame assembly generally within an arc about a horizontal axis extending transversely to said frame assembly and rearwardly of said front wheel to a plurality of adjusted positions between a lowered, forward position for racing posture and an elevated, rearward position for touring posture and for locking said handlebar assembly in any of a plurality of adjusted positions while permitting steering of said front wheel by a seated rider in each position, and a foot peg carried by said frame assembly and adapted to accommodate the foot of a rider, said foot peg being adjustably supported by said frame assembly generally along an arc having its center positioned forwardly of said rear wheel between a first position spaced forwardly and downwardly so as to accommodate the touring posture and a second position spaced upwardly and rearwardly of said first position to accommodate the racing posture, the arcs of adjustment of said handlebar assembly and said foot peg lying substantially on the same circle.
Dependencies are inferred from the claim text.