frankb Posted December 17, 2019 Report Share Posted December 17, 2019 Hi. Just picked up a 1968 520. Thing runs great, but only does about 45mph. I know it has 67hp, but my u521 has the same engine and will easily do 65mph. wondering what it could be. Just had the carb fixed and it's better, but I have no idea what else it could be. maybe the rear end? Any advice or mods would be greatly apprciated. 1 Quote Link to comment
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