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#59775 - 03/01/08 2:51 am J.A. P. engine  
Joined: Apr 2005
Posts: 85
iron ariel Offline
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iron ariel  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 85
New Westminster, BC, Canada
Got an oldie here (not a Goldie). Just picked up a project bike, powered with of all things, a 1932 J.A.P. 600cc, single cylinder flat head. What up with that!? Of course I don't know anything about that particular engine- what machines used that engine, what are the specs, etc. etc.? Anyone got the goods on this one? Engine is rebuilt and good for something or some one and I need to decide weather or not to keep it in the Ariel frame or part it out. Thanks

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#59776 - 03/06/08 3:13 pm Re: J.A. P. engine  
Joined: Aug 2001
Posts: 1,081
Phatt Bob Offline
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Phatt Bob  Offline
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Joined: Aug 2001
Posts: 1,081
Cheshire UK
Do a bit of research before you bin it.

You're in good company with a JAP, everything from Brough Superiors to Zeniths fitted them at one time or another..(vee twins though)

Bob


Phatt Bob
'95 Daytona 1200
'98 Daytona 1200 dragbike
ex-850 T140 Caff Racer, 850 Triton, Morgo T120, Starfire and Pretend Daytona 500 owner
#59777 - 03/06/08 4:16 pm Re: J.A. P. engine  
Joined: Jul 2002
Posts: 604
Tom_dup1 Offline
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Tom_dup1  Offline
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Joined: Jul 2002
Posts: 604
England
There was a guide to deciphering JAP engine codes in the Technical Section (Richard Rosenthal) of The Classic Motorcycle last year (I think, but definitely recently) if you have access to back copies.

HTH

Tom

#59778 - 03/06/08 5:06 pm Re: J.A. P. engine  
Joined: Apr 2006
Posts: 86
DM Offline
BritBike Forum member
DM  Offline
BritBike Forum member

Joined: Apr 2006
Posts: 86
Cornwall
J.A.P engine codes are hers

http://www.xvo73.dial.pipex.com/ht/japident.htm

Dennis

#59779 - 03/06/08 5:55 pm Re: J.A. P. engine  
Joined: Jun 2005
Posts: 276
Bucket15 Offline
BritBike Forum member
Bucket15  Offline
BritBike Forum member

Joined: Jun 2005
Posts: 276
NC
Iron Ariel,
I would love to see some pictures of your bike.
I myself have a 600cc JAP engine (for a very long term project). Mine is a '33 with a "Sports" designation. The head and cylinder are one big piece. Versions of this engine were used in everything from pumps to rototillers to Cotton motorcycles, just to name a few.
Here is later model with the separate head and cylinder:
J.


Piles and piles and piles...
#59780 - 03/06/08 9:46 pm Re: J.A. P. engine  
Joined: Sep 2006
Posts: 85
Ray Smith Offline
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Ray Smith  Offline
BritBike Forum member

Joined: Sep 2006
Posts: 85
Wales
I used to have an AJW sidecar outfit powered by a JAP 600cc side valve.You say it is a project bike.Do you have a fuel tank if it is an AJW it will have a raised V on the rear end of the tank designed to direct rainwater away from the riders vitals.It was a feature on AJWs for years.(we are talking 30"s here).I seem to recall part of the frame was a casting. Good engines. Good luck with the project.

#59781 - 03/07/08 1:25 am Re: J.A. P. engine  
Joined: Jun 2005
Posts: 276
Bucket15 Offline
BritBike Forum member
Bucket15  Offline
BritBike Forum member

Joined: Jun 2005
Posts: 276
NC
Mr Smith,
Do you have any images of your AJW?
If so I would really enjoy seeing them.
J.


Piles and piles and piles...
#59782 - 03/07/08 6:10 am Re: J.A. P. engine  
Joined: Apr 2005
Posts: 85
iron ariel Offline
BritBike Forum member
iron ariel  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 85
New Westminster, BC, Canada

#59783 - 03/08/08 12:35 am Re: J.A. P. engine  
Joined: Sep 2007
Posts: 55
PBMW Offline
BritBike Forum member
PBMW  Offline
BritBike Forum member

Joined: Sep 2007
Posts: 55
Bremerton, Washington, USA
Interesting stuff. I have an Ariel VB 600 sidevalve motor in teh celler...
Looking around to see if there are more Ariel parts around.

#59784 - 03/08/08 2:59 am Re: J.A. P. engine  
Joined: Apr 2005
Posts: 85
iron ariel Offline
BritBike Forum member
iron ariel  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 85
New Westminster, BC, Canada
PBMW, let me know what you find. Wade

#59785 - 03/14/08 9:43 pm Re: J.A. P. engine  
Joined: Sep 2006
Posts: 85
Ray Smith Offline
BritBike Forum member
Ray Smith  Offline
BritBike Forum member

Joined: Sep 2006
Posts: 85
Wales
Sorry Bucket no AJW pictures.I loved Iron"s Ariel pics


Moderated by  Alan_nc 


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