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Motorcycle Parts

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Connecting Rod
This part transmits the piston's reciprocating linear motion to the crank by converting it into rotary motion. Since this is a very critical component used in extremely harsh conditions, hot forged alloy steel, such as chrome molybdenum with heat treatment is the preferred material choice. Precision machining produces this meticulous part.
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Shift Fork
Combined with the shift drum, the shift fork is the primary conponent used for motorcycle gear shifting. The Atsumitec group is proud to be the world's leading manufacturer of shift fork production. This part requires precision machining, not only for durability and strength requirement, but also for shift feeling.
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Shift Drum
It is an integral component for motorcycle shift changing. The shift drum is a casted part with cylindrical shape, and rotates its angle from shift pedal to move the shift fork with grooves on its outside surface to change the gear. Grooves are machined by using a machining center to guarantee accurate control of each shift position.
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Balancer Shaft
It counteracts the vibrations caused by crankshaft rotations to improve both safety and ride feeling. The balancer shaft is formed by hot forging process and casting mold. Balancer shaft materials primarily consist of the following; chrome molybdenum, carbon steel, and cast iron.