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In all mtorcycles I would recommend using the top of the line. We tried to use regular unleaded and it sounded like crap and ran like crap. So when we switched to super unleaded it ran like a champ. So from experience do the super it costs more but works way better. If it still runs like crap I recommend c-foam. We have a 1990 Yamaha FZR1000 and this is everything that we did to make it run great. We took out all of the old gasoline 1st. And I know that the same is true for Harleys. Thanks.

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13y ago

What else can I help you with?