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Sportster Motorcycle Motor - Top End Discuss Sportster Motorcycle Top End issues. Rockerboxes, Valves, Cylinders, Pistons, Rings, Lift Rods, etc...

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  #1  
Old 10th January 2022
scottoxlch scottoxlch is offline
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Default Sputhe head question

Helping a friend restoring a dual carb Sputhe sportster engine. It has XR750 cams and we have no idea what kind of valve spring seat pressures we should shoot for. Any advise or thoughts much appreciated.
Scott
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  #2  
Old 14th January 2022
Turbo Sporty 48 Turbo Sporty 48 is offline
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When I groogled up XR750 valves, came up with this.
You might give Hammer Performance a call, probably the source of this information, http://hammerperf.com/contactus.shtml
http://www.nrhsperformance.com/tech_xlcaminstall.shtml
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  #3  
Old 14th January 2022
scottoxlch scottoxlch is offline
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Thanks 48. Some good stuff there. I did find a guy who is well versed in building XR750 engines so he can help me out too.
Scott
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