Hyper-21 8P-RX Seilzugstarter Graupner 1537 3.49 cc capacity. High-power rear exhaust motor with pull-cord starter and 8 transfer ports. ABC piston / liner set, special twin-ballraced car crankshaft, tall heat-sink head for good heat dissipation, slide carburettor. Excellent starting and running characteristics even in high ambient temperatures.
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