06-17-2008, 10:03 PM #1
Cylinder down - Billet Valve Failure
Had a cylinder go down on the weekend, it was on my ported 1300. It looks like it was from the billet power valve breaking. It broke along the groove. It doesn't look like a lean seizure but any comments are welcome.
06-17-2008, 10:07 PM #2
Maybe check the existing PV's to make sure they are the right size/shape for your bore???
06-18-2008, 12:30 AM #3
Yep it is important to fit the valves to the piston when doing the install .020 min clearance between the valve and piston, also make sure there is no binding on the valve shaft and that it moves freely. Gas valves are sweet but they do take a little bit upfront set-up for maximum benefit.
06-18-2008, 12:35 AM #4
Yep, same thing happened to me TWICE. That is why my valves are now pinned in place!
06-18-2008, 08:10 AM #5
The cylinders and valves were setup by a professional builder. The valve must have had a weak spot in it. It did break along the groove.
06-18-2008, 07:11 PM #6
- Join Date
- Nov 2006
Damn that's painful. I've been bumming about my # 3 cyl. issue..
Sorry to see your damage
06-19-2008, 11:03 AM #7
how come u didnt make it to the bug???
06-19-2008, 11:13 AM #8
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