Talk:Gilera Runner

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gud day, i have a gilera 180 sp i used as 2t the castrol a747 in the auto lube is it ok ? why is it if i starts the engine in several seconds the engine turn off like there is no idle, and its back fire the exuast pipe like explosive, what should be the best thing i will do and the exuast pipe become smokeless thers no smoke coming out thru the exuast pipe