| 11. | Valve cover and airbox were entirely made of carbon fiber.
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| 12. | The intake valves were slightly smaller, and cast aluminum valve covers replaced the chrome.
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| 13. | All V8 engines received hydraulic roller lifters and new valve cover / head design.
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| 14. | The valve cover is made of magnesium to save weight.
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| 15. | Later engines featured a PCV system that was molded to the cylinder head valve cover.
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| 16. | The 350-4bbl engine received a boost in compression, roller lifters, and new center-bolt valve covers.
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| 17. | Other whimsical touches abound : Lego figurines replace the door-lock stanchions and the tire valve covers.
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| 18. | Despite the difference in engine displacement, the two bikes share valve angles and magnesium valve covers.
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| 19. | The valve cover is powered by gravity.
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| 20. | The latter had the red valve cover replaced by a green one, to emphasize the environmental friendliness.
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