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Original Valve Springs were Shot. Going to AVnV Beehives. Springs a 1.880 set height will be the same as the old triple springs. Old Springs were 140,150,150,160 at install heights. New ones are all 172 -174. At 1.935, I'll need a 0.015 shim as the spring base is 0.040 but might need more as this was before I recut the seats.
The exhaust flow was phenomenal on this bench. Only thing was that there was a significant difference between the front and rear. Even the worse flowing front was excellent. I think it's the bench and tried to change the flow pattern with vanes. Picked up flow in the front doing so.. IMO it's the small plenum in the bench..
Heads were flat on both sides. CCed at 83.7 and 83.9.
Can you explain your thought on why the valve spring failed - your words - dead
does the valve stem top have a star pattern on it - or a single line rub < this rub is it centered or off center
you could picture up the top and side of the top so i see if its a satellite tipped valve
The seat pressure for the valve spring is speced at 170 lbs. With one at 140, I'd consider all of them pretty much worn out.. 49000 miles at 630 / 640 lift did them in. I had to rebuild a FXDX at 64000 and the same valve springs with about 40000 miles and 0.625 lift were also shot. Even a little worse..
I believe the valves are Stellite tipped.. The valve ends likely have some schmutz off the Trock valve lifters. New valve have the ends ground a little weird tho..
1 new exhaust stem
2 new intake end
3. Left old exhaust ends. Right new exhaust ends. Left top (old one) has issues but the roller rocker looks good.
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Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
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Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
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