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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: May 2016
Posts: 72
Just Getting Started
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OP
Just Getting Started
Joined: May 2016
Posts: 72 |
Good afternoon all, I have visited a friend who has just obtained an early JAP engine, and was wondering if this came from a Morgan, rather than a motorcycle. Can anyone help? It seems all present and correct, box of rods flywheel etc.  Here's some numbers.  
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Joined: Oct 2012
Posts: 6,538
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2012
Posts: 6,538 |
It could be ...but best to check with the Morgan Three Wheeler Club.
Neil
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Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2014
Posts: 2,272 Likes: 7 |
As Neil says it could be . The reason for that is that is is water-cooled and most bike engines were air-cooled at that time.
Best check with the Morgan 3 Wheeler crowd for a more definitive answer.
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Joined: May 2016
Posts: 72
Just Getting Started
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OP
Just Getting Started
Joined: May 2016
Posts: 72 |
I have found out, KT 980 cc. v-twin 50deg 85,7 x 85 mm.
I guess the W is water cooled.
I have emailed The Morgan Three Wheeler Club too. Good idea Neill
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Joined: May 2011
Posts: 1,625 Likes: 25
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2011
Posts: 1,625 Likes: 25 |
The JAP KTW engines were used in Morgans from 1921 to 1931. See this website http://morgan3w.de/engines/engine.htm
Last edited by Rog G; 21/08/17 03:51 PM.
2021 M3W
2013 M3W - Sold
1971 4/4 2 Seater
1934 Sports
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Joined: Oct 2012
Posts: 6,538
Talk Morgan Sage
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Talk Morgan Sage
Joined: Oct 2012
Posts: 6,538 |
Well done Roger - wondered if you would know!
Neil
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Joined: Aug 2015
Posts: 1,616 Likes: 143
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2015
Posts: 1,616 Likes: 143 |
Yes, almost certainly ex Morgan three wheeler for reasons set out above.
Also it has the correct magneto front cover as motorcycle fitment used a chain drive magneto as opposed to the bevel gear driven Morgan magneto.
Turning to the rear, no evidence of a chain mark on the crankcase, suggests that this was run with a cone clutch.
The letter after the oblique is significant as using the JAP dating code 'PNEUMATICS' where P indicates 1920, N indicates 1921, E indicates 1922, this engine can be dated to 1923.
Arwyn
Last edited by Arwyn Williams; 21/08/17 08:10 PM.
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Joined: Sep 2010
Posts: 2,433 Likes: 17
Talk Morgan Expert
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Talk Morgan Expert
Joined: Sep 2010
Posts: 2,433 Likes: 17 |
I wish I was clever like you Arwyn ;-)
1969 4/4
1995 plus 8
1996 Plus 4 4seater
2002 Aero S1
2013 M3W
2014 Plus 8
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