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Ok thanks. There is no needles. It is a ball bearing engine. There is one screw type adjustment near the air filter and where the fuel line enters the engine. I will post some pictures.
Hi i have a fuel R/C car and when it is warm it some times cuts out. Also it struggles to start when hot. Does anyone have one of these cars? I wondered if it was too rich but not sure on which way to tune the supply valve.