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1 Week Ago
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XL FORUM LIFE MEMBER
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Join Date: May 2014
Posts: 1,387 Sportster/Buell Model: xlh Sportster/Buell Year: 1974
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Quote:
Originally Posted by Ferrous Head
Physics don't lie. And they are never wrong.
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Quote:
Originally Posted by Ferrous Head
Turns out, we might have some things wrong about physics.
Some are now postulating there is a 5th unknown force affecting things which may alter our understanding of physics.
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Monte, Looks like all the answers you got are suspect. You'll just have to accept the fact that the piston hit the valve and move on. 
Or maybe it was the valve that hit the piston?  |
1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: Jan 2020
Location: Loxahatchee, FL (S. FL)
Posts: 1,137 Sportster/Buell Model: XLCH Sportster/Buell Year: 2003 Sportster/Buell Model #2: XL Sportster/Buell Year #2: 1981 Other Motorcycle Model: FXDC Other Motorcycle Year: 2013
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lol
sheep lie
__________________
Steve
'81 Andrews "Y" cams, K. Black 9-1 pistons
'03 1250 NRHS stage two Lightning heads, 536, mik 42
'01 Cyclone
'13 FXDC 96" stock
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1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: May 2007
Posts: 4,963 Sportster/Buell Model: Ironhead XLH Sportster Sportster/Buell Year: 1978 Sportster/Buell Model #2: Ironhead XLT Sportster Sportster/Buell Year #2: 1977 Other Motorcycle Model: Honda CBX 1000 Other Motorcycle Year: 1979
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Is your valve height correct? If new seats were installed and they weren't ground to achieve correct valve height, the valve could be sitting too far down, hence the contact with the piston. Just thinking....
__________________
1978 Anniversary Edition XLH. Wiseco 10:1 forged pistons, Andrews R5 cams, dual plugged heads with Super Port Flow, single fire ignition, Mikuni Solex 36 PHH carb, Jagg oil cooler, '73 gauges, kickstart, Barnett kevlar clutch, Progressive front springs, Hagon Nitro shocks, all-Andrews tranny. 1977 XLT, Mikuni Solex 36 PHH carb, tapered dual exhausts, Andrews Y cams, Progressive front springs, Hagon Nitro shocks.
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1 Week Ago
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Senior Master Custom Bike Builder
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Join Date: Mar 2008
Posts: 4,802 Sportster/Buell Model: XLCH Sportster/Buell Year: 1969 Sportster/Buell Model #2: 1966 XLCH Other Motorcycle Model: BMW Twin Other Motorcycle Year: 82
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Reply
Quote:
Originally Posted by needspeed
Monte, Looks like all the answers you got are suspect. You'll just have to accept the fact that the piston hit the valve and move on.
Or maybe it was the valve that hit the piston? |
Need, both pistons front and back kissed Identically, its been dealt with already, you know my email if you ever want to chat further, thank you
__________________
Cycle World Oct 1962:
'The Sportster XLCH is not every Man's cup of tea - and we don't think it was intended as such'
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1 Week Ago
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Senior Master Custom Bike Builder
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Join Date: Mar 2008
Posts: 4,802 Sportster/Buell Model: XLCH Sportster/Buell Year: 1969 Sportster/Buell Model #2: 1966 XLCH Other Motorcycle Model: BMW Twin Other Motorcycle Year: 82
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I appreciate all the replies, all good info, the Cams were found one tooth off from the Pinion Gear, has since been corrected, ride safe...
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1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: Jun 2011
Location: On a farm
Posts: 6,513 Sportster/Buell Model: XL77.2R Sportster/Buell Year: 2006
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Quote:
Originally Posted by Ferrous Head
Hold everything.
Turns out, we might have some things wrong about physics.
Some are now postulating there is a 5th unknown force affecting things which may alter our understanding of physics.
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They watches Third Rock from the Sun too often.  |
1 Week Ago
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XL FORUM LIFE MEMBER
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Join Date: May 2014
Posts: 1,387 Sportster/Buell Model: xlh Sportster/Buell Year: 1974
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Quote:
Originally Posted by Monte03
.. both pistons front and back kissed Identically, its been dealt with already..
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Yep, even from the start of the thread, I knew you probably already had it figured out.  |
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