A lot of people think the
Knucklehead was the prettiest engine ever built by Harley-Davidson, or
anyone else for that matter. During the depths of the Depression, the
Motor Company spent years developing its overhead-valve design.
Still, combustion chamber
efficiency has come a long way since the Knucklehead. Our Dual Plugging
kit will eliminate the detonation your Knucklehead is prone to.
Our replacement valve
springs will reduce friction. And our Super Port Flow process will
dramatically increase power.
In addition, you should
consider our No Lead Conversion service to save your valves from today's
lower-octane, lead-free gas. Your beautiful Knucklehead will run cooler
and have more power to boot.
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