| 1. | Some helmets have an extra manual exhaust valve known as a spit-cock.
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| 2. | One lobe operated both the intake and exhaust valve for each cylinder.
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| 3. | The exhaust valves were also larger than the RC30 s in diameter
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| 4. | The different valve angles allowed for larger diameter intake and exhaust valves.
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| 5. | Physical compatibility requires the installation of hardened exhaust valves and seats.
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| 6. | Many producers of two-stroke performance bikes fit them with the exhaust valve systems.
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| 7. | The engine speed is regulated via opening and closing of the exhaust valve.
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| 8. | After combustion, the camshaft opens the exhaust valve, and the gases are expelled.
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| 9. | Each cylinder has one intake valve, one exhaust valve, and one auxiliary valve.
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| 10. | Inlet and exhaust valves were actuated by shaft driven overhead camshafts.
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