2002 harley fat boy
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From: Honah Lee
If you follow the instructions, snug them carefully, when they are right, there will be little valve train noise.
You basically are putting the internal piston in the lifter in the middle of it's 0.200 travel.
That allows for heat expansion in the engine components. The valve springs override the lifter capacity.
The number of threads per inch on the adjustable rod determine the turns to go more after you, at top dead center and you have no play, turn to sink the internal piston in the lifter.
Need to know what you have. Not all rod have same threads. May even be some lifters that are different.
Some high performance cams don't waste any degrees for a few thousand rise before the lift to allow for lifter bleed. There base circle diameter and lift. They will be a little noisy
Keep in mind, I just briefly condensed a 1" thick book on lifters, pushrods, camshafts and heat expansion.
You basically are putting the internal piston in the lifter in the middle of it's 0.200 travel.
That allows for heat expansion in the engine components. The valve springs override the lifter capacity.
The number of threads per inch on the adjustable rod determine the turns to go more after you, at top dead center and you have no play, turn to sink the internal piston in the lifter.
Need to know what you have. Not all rod have same threads. May even be some lifters that are different.
Some high performance cams don't waste any degrees for a few thousand rise before the lift to allow for lifter bleed. There base circle diameter and lift. They will be a little noisy
Keep in mind, I just briefly condensed a 1" thick book on lifters, pushrods, camshafts and heat expansion.
Last edited by Jackie Paper; Jun 20, 2025 at 02:50 AM.
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