Sp500 Vs. Sp500H.O
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Sp500 Vs. Sp500H.O
BBS is right. They have a more aggressive cam and a larger carb. 40mm Mikuni vs 36mm Mikuni. I thought I've heard that the HO also has a little bit different clutching than the standard SP500. The HO makes 20% more peak horsepower but loses some low-end power. The bigger carb would probably be the main reason for less low-end power.
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