Bump Start . . .

Do this with a Twin Cam too many times and throw the flywheels out-of-true - eat your oil pump bearing and ruin your day.....

6 comments:

  1. What causes that? The shock load during starting, or ???? Does it twist the crank or cause the tapers to slip?

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  2. The jolt moves one flywheel 1/2 a bit on the crank pin taper.

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  3. No taper on these Richie. All pressed together

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  4. No taper on these Richie. All pressed together

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  5. Sorry, you always have to tell me twice.... This blog is so informative.

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