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1980 GS850 Head Gasket Replacement

  • Thread starter Thread starter kdchart
  • Start date Start date
Hi, I'm in a middle of replacing my base gasket. My question has to do with the pistons. The pistons have a little scoring on one side. The manual tells me to change all the pistons. The pistons look okay except for that and are within dimensional tolorance. Can I reuse the pistons? My bike has 25,000 miles on it 1981 GS850GX
 
rcarteraz said:
Hi, I'm in a middle of replacing my base gasket. My question has to do with the pistons. The pistons have a little scoring on one side. The manual tells me to change all the pistons. The pistons look okay except for that and are within dimensional tolorance. Can I reuse the pistons? My bike has 25,000 miles on it 1981 GS850GX
Click to expand...

25,000 miles is nothing to these engines. The pistons won't look factory pristine, but they'll work just fine. Put 'em back in.

Scoring means vertical grooves that catch your thumbnail, and visibly missing metal. It's abnormal wear from foreign matter that's very unlikely to look the same on all four pistons.

The light scuffing you're probably looking at feels fairly smooth and is harmless and normal.
 
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