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Help with S&S pistons

Moderators: Curt!, Pa

Post Fri Apr 24, 2009 5:58 pm

Posts: 2677
Location: Los Angeles, CA
I am putting this basketcase Panhead back together. It has S&S 1/2" stroker wheels and S&S/TRW pistons. The pistons have no marking inside them to tell me which way is to be installed towards the front of the motorcycle like H-D pistons do. Does it matter? :(

Post Mon Apr 27, 2009 8:48 am

Posts: 301
Location: Ohio
I don't know either Chris. Have you tried calling the S&S tech support people?

Post Mon Apr 27, 2009 10:20 am

Dome markings are sometimes arrows or simply lines pointing along the wrist pin axis - they generally go to the right (cam side).
Measure the pin hole - if it's centered (same distance from the hole to the skirt on both sides) it makes no difference (except for the skirt to skirt clearance - be careful).
If it's different (at least .060" longer on 1 side) the short side goes to the rear.

Post Mon Apr 27, 2009 9:19 pm

Posts: 2677
Location: Los Angeles, CA
Thanks Panic.

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