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  #1  
Old 5th November 2019
Ferrous Head's Avatar
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Default Valve angles

Anyone here know what the included valve angles are on an XR ?

Would they be 68 degrees ?
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  #2  
Old 7th November 2019
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Valve Angle, Intake: 33 Degrees
Valve Angle, Exhaust: 35 Degrees

68 degrees total (1977 XR750)
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  #3  
Old 7th November 2019
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Thanks Al, Just exactly what I was looking for.

I don't suppose you know anything about Strociek heads ?
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Old 7th November 2019
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Nope, afraid not...
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  #5  
Old 7th November 2019
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If I recall correctly, the angle is very good looking.
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Old 7th November 2019
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OK. I'll check some more in the Ironhead Forum.

I don't think the Strociek engine is related to XR's but he might have taken design cues from them. (I have one)
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Old 8th February 2020
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click to enlarge
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  #8  
Old 8th February 2020
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In that diagram, the included angle is zero.
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