56
of outer tube is to prevent oil from leaking out.
Compression stroke
W
hen bearing load on the top of front absorber, inner tube moves down (that is to say,
inner tube goes into outer tube), or when front wheel strikes on ground, outer tube moves
up, in the process of compression, the damping spring and air
are compressed in inner
tube. At the same time the capacity of upper cavity increases, which reduces
pressure between piston lever and outer tube. For fall of capacity between piston
lever and outer tube oil flows into upper cavity, and as a result of the fall
of capacity of lower cavity, damping oil goes up into upper cavity without damp
through buffer bush, and compressed oil passes through big damp hole into piston
lever inner hole and main cavity chamber without damp until inner tube moves
to buffer prick. When compression stroke completes, the clearance between bush
and buffer prick in inner tube assy. is near zero, in this way damping strength
may slow down flowing speed of damping oil. Finally oil lock forms and
compression stroke is over.
Comeback stroke
Comeback stroke
Comeback stroke
Comeback stroke
In the comeback stroke, compressed damping spring extends to push inner tube back from
its bottom, when inner tube moves away, the pressure in upper cavity rises up for the capacity
of upper cavity degrades, which forces that damping oil flows into main cavity or lower cavity
only through two small damp hole of piston lever (for damping oil cannot flow back directly
through original single direction valve). The two small damping holes limit that damping oil
flows into inner tube and preduces damping strength in the process of comeback stroke. When
comeback stroke completes, buffer spring and the two small damping hole go on limiting comeback,
when buffer bush goes up, the two small damping hole may be sealed father, then the capacity
of upper cavity decreases, finally oillock forms and comeback storke completes.
Damping strength of fromt absorber directly relies on the quantity of oil. Bad effect
---freeze may happen if used oil quantity or viscidity is too high. Bad effect –soft may
happen if used quantity or viscidity is too low.
It is recommended to use OIL N46 or equivalent engine oil.
Replacing period: per ten thousand kilometers or below one year.
Summary of Contents for ARN125
Page 5: ...5 A GENERAL INFORMATION...
Page 11: ...11 B PRODUCT...
Page 13: ...13 1 2 3 4 5 6...
Page 14: ...14 7 8 9 10 11 12...
Page 24: ...24...
Page 37: ...37 F Lubrication system Rocker arm Camshaft assy Crankshaft assy Oil pump assy Fileter assy...
Page 52: ...52...
Page 62: ...62...
Page 63: ...63 Charging system circuit diagram AC circuit diagram...
Page 72: ...72 C OTHERS...
