When re-assembling the top end of the engine, piston rings should have their end gaps spaced around the 360° of the piston to minimize blow-by.
ringgaps.png
When re-assembling the top end of the engine, piston rings should have their end gaps spaced around the 360° of the piston to minimize blow-by.
ringgaps.png
I will add that the top 2 ring gaps should be on the intake side of the piston, not on the thrust side.
Jim O'Brien
1979 CM400T aka the Roadbike, 1978 CB400T1 semi restored, 1972 CL350K4 restoration and the 1971 SL350K1 disaster zone.
Plus 2 SL350K0's , 2 SL350K1's, 1 CL350K0 and 1 CL350K1 waiting for space and time
Contact: 408-239-9580 or [email protected]
I was taught long ago that the gaps on the top compression ring and the second compression ring should be 180 degrees apart. This forces the gasses to travel the longest distance to get from one ring gap to the next. One piece oil rings gap was then aligned slightly off the top compression ring. Same reason. Three piece oil rings had the top ring near the top compression ring, the bottom ring near the second compression ring. Again, all this was designed to force the gasses to travel the maximum distance to get from each ring gap to the next.
1981 CM400T
And after assembly they do their own dance.
https://www.highpowermedia.com/Archi...f-piston-rings
Interesting study, not something I was aware of.
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