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Old 02-16-2008, 09:12 PM
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gil_millan1
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Default Go .21 Engine Question
I have the Go .21 5 ports engine, and so far it runs great. i just have a question about shims. i am running 30% nitro fuel, and i dont know if i should remove or add any shims. i took apart the engine and i notice that it has 2 copper shims from factory. should i remove one?
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