Motorcycle Frame Article Index for
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Information About

Motorcycle Frame




Motorcycle frames come in a variety of shapes and materials, frames have been made from Titanium , Aluminium , Magnesium , Steel and Carbon-fibre along with combinations of these materials.


FRAME MATERIALS


Steel

;Examples
Early Honda CBR600


Aluminium

;Examples
Honda VFR750


Aluminium and carbon-fibre

;Examples
Bimota SB8K (composed of two aluminium alloy beams and carbon fibre plates)


Carbon Fibre

Bimota TESI 3D


Titanium

;Examples
1971 Titanium Husqvarna


Magnesium

;Examples
Elfr 1986


Magnesium and Aluminium

;Examples
Aprilia ETV 1000 Caponord (aluminium alloy welded on to aluminium-magnesium alloy castings)


FRAME TYPES


Single cradle


The motorcycle engine is held in a single cradle with a single spine.


Half-duplex cradle frame

The motorcycle engine is held in a double cradle with a
single spine and single downtube.

;Examples


(Full) duplex cradle frame

The motorcycle engine is held in a full by two separate cradles, normally with a single spine.

;Examples


Double cradle or perimeter frame


Two cradles follow the perimeter

;Examples


Spine or backbone frame


The motorcycle engine is suspended from a single spine.

;Examples
Honda CD200-T Benly
Lots of (new) Triumphs.


Beam

Twin beams join headstock to swingarm pivot in as straight and
short a line as possible.

;Examples


Monocoque

Supports structural load using the frames external skin.

;Examples
Honda NR500


Trellis


Similar to the beam frame, connectting the steering head and swingarm pivot point directly as possible.
The frame is made up of a large number of short steel (or aluminium) tubes welded together to form a trellis.

;Examples