Chapter 6
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A Transmission Photo Essay
2009/09/09
Laid out on the bench are the major components of the transmission. How does it work?
Transmission components
Below we see the assembled components.
All this stuff slides into the engine case behind the crankshaft. At the bottom is the splined shaft the kick-starter attaches to and at the top is… um.. the output shaft?
Here we see the transmission inserted into the (right hand side) engine case. At this point I started looking for the place the sprocket attaches. I recognized the tapered shaft on the right where the clutch puts its input to the transmission, but where does the out-put attach?
After turning the shafts and shifting the gears a bit, it dawned on me the splined shaft just to the left of the tapered clutch shaft was turning at a different rate! Oh Yeah! That’s the shaft the sprocket fits on !! How ingenious : -) The input shaft is inside the out-put shaft – I get it !
This is probably a very common arrangement, but heck, I’d never really seen a motorcycle transmission before – let alone understood how one works.
Not only do I now know how one works – I played with it enough, up and down through the gears, that I proved to myself that the rusty Triumph from Kentucky’s transmission works like it’s supposed to. HA! I win again : -)
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