Kickstart pinion and ratchet T140E - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 6 (permalink) Old 11-07-2012, 02:28 AM Thread Starter
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Kickstart pinion and ratchet T140E


I've made earlier posts on changing the kickstart quadrant and got good advice. I initially thought that the ratchet and pinion were ok, but have found one broken tooth and one half broken tooth on the pinion so decided to replace that and the pinion. I got the retaining nut off ok, but the pinion seems stuck on the lay shaft. I did try some judicious banging with a hammer (not much). Is there a technique to this. My fear is that the pinion has worn the lay shaft. Is there a good way to get the ratchet and pinion off?

Any advice greatly appreciated. It's a 1980 Bonnie T140E. When I fix this, I've only (pray to god) one more thing to sort - carburretion.

Arthur (Apiarist1)
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post #2 of 6 (permalink) Old 11-07-2012, 02:30 AM Thread Starter
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Sorry, I meant the ratchet - I couldn't get the ratchet off.
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post #3 of 6 (permalink) Old 11-07-2012, 03:53 AM
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It could be a good idea to check the parts manual.It didn't change much from 1938 until last Meriden production,even L F Harris production.See Tecnhnical section "sticky".

The outer ratchet could be a tight fit on its splines.If you knock the shaft toward the primary side it should come clear of the mainshaft spline.Use a soft hammer or aluminium drift.The kick start pinion sits on a steel bush.The bush and pinion should easily slide off the mainshaft.
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post #4 of 6 (permalink) Old 11-07-2012, 05:26 AM
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The first tooth should be missing and the second ground down to allow for smooth engagement.

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Sam Murray

Aberdeen, Scotland
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post #5 of 6 (permalink) Old 11-07-2012, 06:36 AM
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I had the same problem. In the end I did what Pete suggests, then, once off, I went over the splines on the ratchet with needle files very carefully to relieve them slightly (it is very hard steel so difficult to take too much off). I had to remove it again and that time, some tyre levers behind the pinion (with protection for the casting surfaces) did the trick.
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post #6 of 6 (permalink) Old 11-07-2012, 08:42 PM Thread Starter
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Pete, did you mean tap the mainshaft?

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