Quote:
Originally Posted by Aryan
@chilled: Just 12.5k on the clock and the clutch plates or balancer shafts needs replacement/ overloading?
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OK, decided to clear it all for all those who do not know it...
Balancer Mechanism: Balance mechanisms are commonly used to reduce or cancel shaking forces and/or vibrations which result from rotating and/or reciprocating parts, or mechanisms. These balance shafts also called “counterbalance” shafts.
Balancer shafts are normally used in Multi-Cylinder engines to cancel out the vibrations by rotating at a precisely calculated speed (sometimes two to three times the crank speed, depending on various factors like engine configuration, length of the shaft etc). These shafts are engineered to cancel out the lateral forces.
In a Pulsar 220, to cancel out the vibrations, a spring loaded balancer gear that meshes with the crank is employed. There are counter weights that are attached to the spring loaded mechanism that allow the gear to cancel out any irregular harmonic. Over a period of operation, stress, wear & tear affect the effectiveness of the counter weights. In this case, PBK does what they call as balancer loading where they adjust the spring tension to produce the desired effect.
The closest that you can think of is the concept of wheel balancing. This is when you feel the vibrations in your steering and then you get it balanced by applying counterweights so as to cancel out the harmonics.
Cleverly done, this will ensure that the engine is vibe free and free-revving. On high capacity motorcycles with multi cylinder engines, balancer shafts are used. These shafts drive other ancillaries like the oil pump and water pump to create that loading effect.
Hope this answers most of the doubts
