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General Minitrail Talk
Honda CT70/Z50 Registry
1970 CT70H Manuf. date 6/70 ser# 118130 other shop could not fix
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<blockquote data-quote="waltinbatonrouge" data-source="post: 165602" data-attributes="member: 10684"><p>I'm baaaaack all! Cam timing was dead on.....however......at TDC, when i checked the lash on the intake valve there was NONE. Exhaust was fine. I loosened the nut and removed the valve adjusting screw, there was STILL no lash. The valve spring retainer was up against the bottom of the rocker arm..</p><p></p><p>I pulled the head..and buffed the inside of the combustion chamber for you to take a peek...the intake valve has worn to a very thin rim around the very edge of the face. and was even with the face of the combustion chamber, no discernible margin..</p><p>..there is no angle to the valve seat, nice and smooth..</p><p></p><p>No lash to me equals a loss in compression as the valve doesn't seat..</p><p>what puzzles me is why 150psi compression...</p></blockquote><p></p>
[QUOTE="waltinbatonrouge, post: 165602, member: 10684"] I'm baaaaack all! Cam timing was dead on.....however......at TDC, when i checked the lash on the intake valve there was NONE. Exhaust was fine. I loosened the nut and removed the valve adjusting screw, there was STILL no lash. The valve spring retainer was up against the bottom of the rocker arm.. I pulled the head..and buffed the inside of the combustion chamber for you to take a peek...the intake valve has worn to a very thin rim around the very edge of the face. and was even with the face of the combustion chamber, no discernible margin.. ..there is no angle to the valve seat, nice and smooth.. No lash to me equals a loss in compression as the valve doesn't seat.. what puzzles me is why 150psi compression... [/QUOTE]
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General Minitrail Talk
Honda CT70/Z50 Registry
1970 CT70H Manuf. date 6/70 ser# 118130 other shop could not fix
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