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Old 03-19-2020, 11:45 AM
rgburrill's Avatar
Join Date: Dec 2010
Location: Dallas, Tx CT
Posts: 2,519
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You might want to talk to Horizon. They handle OS and also Saito and Saito has a 11CC gas that supposedly uses the SA61 platform. If that OS61FX has a rear needle valve you might have enough clearance for a rear carburetor engine.