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CYLINDER HEADS WITH EXCHANGEABLE
COMBUSTION CHAMBERS
VHM produces exchangeable cylinder heads for two-stroke engines
in motocross and road racing. With the help of vast experience
in two-stroke tuning, VHM develops products of the highest
quality.
During intensive testing, both on the racetrack and on the test
bench, the VHM head showed better temperature development in the
cylinder head, ultimately resulting in a lower overall engine
temperature. The explanation of this phenomenon lies in the use
of a special aluminum alloy which has very good heat
transference. Another advantage of the material is its
resistance to detonation.
The combustion chamber is very easy to change, simply unbolt the
cylinder head, the combustion chamber slips out; you slip
another in and reassemble. This makes it very easy to adjust the
combustion ratio to different circuits and fuels that are used.
While many standard inserts are available, VHM will produce
inserts of your special design or you can purchase blank inserts
and cut them yourself. Combustion chambers are available for
both leaded and unleaded fuel.
A “HEADSET” consists of a cylinder head,
combustion chamber (insert) and the necessary O-seals.
(V =
Volume, PH = Piston Height, S=Squish)
PISTON HEIGHT INSTRUCTION MANUAL
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