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Piston orientation

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Piston orientation
Started at 06:39pm on the 7th February, 2018 by Felix
Felix Subject: Piston orientation
Just went to install new US-made Robbins piston and fresh-bored cylinder. The only crown mark is 040 near one valve recess. Does it matter which way round? No mention in the instruction label. Thanks.
Posted: 06:39pm 7th February, 2018
ric Subject: Piston orientation
No difference in valve cutout size or the presence of gudgeon pin offset ?
Posted: 08:00am 8th February, 2018
Rattlebattle Subject: Piston orientation
The closed end goes at the top....
Posted: 10:01am 8th February, 2018
Alan R Subject: Piston orientation
------unless it's an OE piston, in which case it'll be open at both ends, eventually !!
Posted: 07:32pm 8th February, 2018
Felix Subject: Piston orientation
That's why I'm replacing that stock lump. Still, I miss riding my bike while awaiting machine work. This is my sole bike, and I can see a role for a cheap and (hopefully) cheerful Sportster.
Posted: 08:14pm 8th February, 2018

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