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Cylinder placement left or right side???

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DJMoore
Posts: 18
Joined: Sun Nov 22, 2020 6:53 pm

Cylinder placement left or right side???

Post by DJMoore »

Guys;
I have a 1974 R/60/6 engine (based upon motor serial #4900216) in my '69 bike.
Checked pressure and left side is only producing about 40 PSI.
Pulled head and cylinder.
Noticed cylinder is stamped (R) with an arrow pointing to front (Vorn).
Am I correct that this cylinder should be on the right side of the engine, or does it mater as long as the valve cutouts are correct for the intake and exhaust?

Any ideas????

Thanks in advance,

Dan

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srankin
Posts: 613
Joined: Fri Jul 14, 2017 8:45 pm
Location: Spencerport, NY USA

Re: Cylinder placement left or right side???

Post by srankin »

The V or vorn arrow points forward there is no right or left piston both are the same. Yes, the arrow has to point forward for the piston to clear the valves properly.

Incorrectly installed one or both of the valves will hit the piston. St.
Owner of a 84, R80RT and 78, R100RS

DJMoore
Posts: 18
Joined: Sun Nov 22, 2020 6:53 pm

Re: Cylinder placement left or right side???

Post by DJMoore »

Thanks,
I figured the "vorn" part and valve cutout issue.
Now trying to understand the "R" stamped.
Assuming its for the "R" series motors, or...

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srankin
Posts: 613
Joined: Fri Jul 14, 2017 8:45 pm
Location: Spencerport, NY USA

Re: Cylinder placement left or right side???

Post by srankin »

R for R series would make sense, otherwise I don't know what it is for. St.
Owner of a 84, R80RT and 78, R100RS

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schrader7032
Posts: 8292
Joined: Fri Oct 27, 2006 3:00 am
Location: San Antonio, TX

Re: Cylinder placement left or right side???

Post by schrader7032 »

Got a picture?
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.

DJMoore
Posts: 18
Joined: Sun Nov 22, 2020 6:53 pm

Re: Cylinder placement left or right side???

Post by DJMoore »

Cylinder pictures.

You can see the “R” next to the arrow and word “vorn”

Dan
Attachments
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870AD6DD-8ECA-45C8-A325-0F03B41CD937.jpeg

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