The inner quadrant is held in the position that corresponds to the same gear as the camplate.Ĭhoosing a Gear for Assembly and Indexingįour-speed spring and plunger gearboxes are conventionally assembled and indexed in one of three gear positions: Then, as the inner cover is pushed into place If the teeth on the inner quadrant and the camplate are meshed incorrectly relative to each other, one or more gears will be inoperable.ĭuring gearbox assembly, the camplate is initially positioned in a particular gear. Indexing the gearbox means to correctly position the inner quadrant relative to the camplate when installing the inner gearbox cover. The camplate movement drives pegs on the shift forks and the forks arrange the gear cluster into the next higher gear. Gears on the inboard end of the inner quadrant mesh with the camplate's and turn the camplate clockwise. That releases the TOP pawl from the guide plate to engage the "stepped" inner quadrant and push its outboard end DOWN and its inboard end UP. In Figure #1, see how raising the gear shift pedal to upshift rotates the gear change quadrant clockwise. The forks slide the gears back and forth on the main- and layshafts for gear changes. When the inner quadrant moves, it rotates the camplate which operates the gearshift selector forks. The gearshift quadrant's plungers (also known as "pawls") engage steps on the inner quadrant, moving it up or down one position at a time. When you move the gearshift pedal it causes the gearshift spindle and plunger assembly (also known as the "gear change quadrant") to rotate in a limited arc, either up or down. How the Triumph Gear-Shift Mechanism Works If you're on a 5-speed gearbox, or one using a leaf-spring, see these links on Leaf-spring and 5-speed gearboxes. Note: This article pertains to the '69 Triumph 650 and other 60sĤ-speed gearboxes using plunger and spring. How to Index the Triumph 650 4-Speed Gearbox 2019 Triumph National Rally – 1 st place – 1963-19 Triumph National Rally – 1 st place – 1963-19 Triumph National Rally – 2 nd place – 1963-19 Triumph National Rally – 1 st place – Competition 2017 Triumph National Rally – 1 st place Best in Show 2017 Triumph National Rally – 1 st place – 1963-19 Triumph National Rally – 1 st place – 1963- 19 Triumph National Rally – 1 st place – 1963-19 Gilmore Vintage Motorcycle Show – 1st place Best in Show 2018 Gilmore Vintage Motorcycle Show – 3 rd place Best in Show 2017 Gilmore Vintage Motorcycle Show – 2 nd place Best in Show 2016 Gilmore Vintage Motorcycle Show – 2 nd place Best in Show 2015 Gilmore Vintage Motorcycle Show – 1 st place Best in Show 2015 Gilmore Vintage Motorcycle Show – 2 nd place Best in Show 2013 Gilmore Vintage Motorcycle Show – 3 rd place Best in Show 2019 Garage Brewed Cincinnati – 1 st place Classics 2016 Concours d’Elegance at St.How to index a Triumph 650 motorcycle gearbox
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