No. You're on to it! This has been incorrectly categorised. It's a part.
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This is a new type starter shaft with 8mm OD and no e-clip needed. The old version has 6mm OD with e-clip slot. With this new starter shaft you are no longer can use the old clutch with 6mm ID ( or Thunder Tiger 30/50 type=6mm ID) Instead purchase a TZ-V2 .50-TT - Clutch (8mm ID). Hope this helps.