Hezemans Rotax 125cc Reed Water Cooled
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Hezemans Rotax 125cc Reed Water Cooled Engine
Identical to Hezemans Rotax 100cc Reed Water Cooled except for bore and stroke. Hezemans obtained a lot of undrilled crankshafts for 100cc engines and machined them to create a larger stroke. Together with the 53.95mm pistons as used in other 125cc engines, this created a 125cc direct drive engine, very similar to the IAME Sudam.
From the outside, the 125cc version can be distinguished from the 100cc by the slightly taller cylinder barrel. The lower edge under the lowest rib is several mm thicker on the 125cc.