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Across 1. Positive _ _ _ _ change method invented by Velocette 5. Part of a bearing 6. Locking method as we shift up or down 9. This type of file may be needed 12. Necessary for a wedding 14. Used to move gear to mesh with another 15. Often beside a nut 16. In both gearbox and sowing kit 17. So much heat may even cause a clutch to _ _ _ _ 19. Small piece may fall out when clutch is dismantled 21. Forth in a four speed 22. Could be used to describe the struggle assembling a box 23. Not the barking kind 25. Often this casing warn off old gears 26. Usually there is a start and an _ _ _

Down 1. Sliding gear that has no cuffs 2. Everything hides behind 3. No good if we have one of these left after a rebuild 4. School boys have them too 7. Locks in a groove on a shaft 8. Gearbox make fitted to some early British Bikes 10. Allows shaft to turn 11. Locks collars on a shaft 13. Circular with many teeth 18. Very handy bench tool when assembling a gearbox 20. You get a red ribbon 24. Shaft that transmits motion from input to drive