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It seems that there are different Rumi engines on the market.
See pictures below. Additionally there have been 3 speed and 4 speed engines. SO far we did encounter only 4 speeds and we do not know what might be different in 3 speeds.

This here shows an engine we have sold systems 72 97 799 (before 70 09 799) without problems
(click pictures to enlarge)
This shows an engine where the baseplate of system 72 97 does not fit. The position of one fastening hole is 3.5mm different and therefore needs a specially made plate
This is the engine used in Rumi 4 speed Scooters This is an engine found in an Super Sport
ss-tt bicarburatore with nr 2*8103
Please check your engine block carefully against those pictures to avoid fitment problems.
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