Triumph Forum: Triumph Rat Motorcycle Forums - View Single Post - BB kit cams vs stock 1700 cams
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post #30 of (permalink) Old 06-24-2011, 11:52 PM
marc hanna
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Originally Posted by Lantesh View Post
They wouldn't have to change any tooling. I believe the cams come in to the factory as cast blanks. An operator would put the cam blank into a machine that grinds it according to what a computer tells it to. So they should easily be able to machine a different profile by simply changing the specs in the computer.

Yup, they probably grind them on a Kellenberger. You only have to change a couple values in the "canned cycles" to raise or lower the lobe height or width. I wouldn't be surprised if they have half a dozen different profiles stored in the control for different production runs or R&D runs. In fact, I wouldn't be surprised if all the Triumph cams for all models are ground on the same machine. 60,000 parts annually is pretty light duty for a CNC machine.

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