Filter Simson specs
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FR 4M 1570 cm3/95.8cuin 18 PS 18 bhp 13 kW
FR 4M 2614 cm3/159.5cuin 30 PS 30 bhp 22 kW
FR 4M 3563 cm3/217.4cuin 46 PS 45 bhp 34 kW