Description
The OS Speed 12XZ (12F-B) is a high performance engine meeting IFMAR (International Federation of Model Auto Racing) specifications produced by OS's SPEED TEAM technicians.
Features:
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A new crankshaft featuring a counter-balancing shape and a more efficient intake port
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The connecting rod is made of a new material, and the crankcase has been strengthened
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Improvements have also been made to the liner ports, inner head and the 12F slide valve carb
Major parts such as cylinder & piston assembly, crankshaft and crankcase have been refined to have a powerful potential equal to more expensive specially tuned or modified engines. Also, it employs a outer head that has many drilled holes for lighter weight and better cooling, and a ceramic rear ball bearing for lower friction loss.
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