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  1. R

    bogs downs with quick twist of throttle

    I have a 1971 750-four that is all stock. If I slowly twist the trottle the bike does fine, but if I give it a fast twist in all gears it bogs down for a second and then takes off. I thought it was the carbs so I rebuilt them using the standard size factory jets. I believe its #120 for the main...
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