Introduction
Tools
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Remove four T27 torx screws, keep note of the different lengths the longer two in the front also hold the bumper spike.
 
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Remove the lock washer with a flathead screwdriver then release the chain brake to remove clutch drum.
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With the chain brake disengaged add your new clutch drum then reinstall the four T27 screws
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Add bar and chain then reinstall cover and 1/2 inch* flange nuts
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.