The gearbox internals have a lot of torque to deal with when transmitting power from a large capacity V-twin engine to the driveshaft, and may be subject to excessive wear over time and kilometres (miles) covered.
This item along with those listed below might need to be replaced during the course of an overhaul.
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Gsx600f Katana 2004 (k4) Usa (e03) forum
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