Put on your blindfolds, into the inner and outer world of valve springs we go!

Using the automated BreakIn Cycle on the SF-902 is the only way to fly for me. Cycling from 1800-2400 RPM in 1 minute is the way I like to break in flat tappets. I do remove the inner springs for this and haven't lost a cam since using this method. J.R.

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