Early J.A.P engine model wanted

[JA Prestwich]

Hi All, My Name is Evan Hale O'Connor and I'm 19 years old from New Zealand. I collect and restore vintage stationary engines and I have 116 of them. I'd Like a Model
ID for this J.A.P engine, I know its off an old mower, but i want to build a motorcycle for it, a vintage style from around 1924.
Thanks
Ev

IMG_3107.JPGIMG_3106.JPGIMG_3105.JPGIMG_3098.JPGIMG_3104.jpg

[c.o.]

I can't answer your question Ev but that's a cool little engine you have there. These guys might know... http://www.oldlawnmowerclub.co.uk/ Oh, and welcome to the forum!

[AFJ]

Hi All, My Name is Evan Hale O'Connor and I'm 19 years old from New Zealand. I collect and restore vintage stationary engines and I have 116 of them. I'd Like a Model
ID for this J.A.P engine, I know its off an old mower, but i want to build a motorcycle for it, a vintage style from around 1924.
Thanks
Ev

[ATTACH=CONFIG]10557[/ATTACH][ATTACH=CONFIG]10556[/ATTACH][ATTACH=CONFIG]10555[/ATTACH][ATTACH=CONFIG]10554[/ATTACH][ATTACH=CONFIG]10553[/ATTACH]

A s.v. JAP engine should be identifiable from the engine code and the bore and stroke. A first letter will designate the capacity and bore/stroke of the engine, second and third letters will give other engine particulars, then will come a "/" and a single letter following that will give the year of manufacture. The number following will be the actual engine number after which there may be a further "/" and letters indicating special features. What is stamped on the engine>

eg. "P" would indicate a 250cc side valve with bore of 62.5mm and stroke of 80 mm. /U afterwards would indicate made in 1923.
PTO would indicate a 500cc V-twin (2x 250cc cylinders 62.5 x 80 mm) and overhead valves. /C afterwards would indicate made in 1928.

[JA Prestwich]

Hi, thanks very much, the sernumber is V/S/45798/S,,,, 175cc

[AFJ]

Hi, thanks very much, the sernumber is V/S/45798/S,,,, 175cc

V = 175 cc side valve, 60 mm bore, 62 mm stroke.
/S/ = 1929 manufacture
45798 = individual serial # for this engine
/S = "engine made to customer's specification"

AFJ

[AFJ]

Hi, thanks very much, the sernumber is V/S/45798/S,,,, 175cc

V = 175 cc side valve, 60 mm bore, 62 mm stroke.
/S/ = 1929 manufacture
45798 = individual serial # for this engine
/S = "engine made to customer's specification"

AFJ

[JA Prestwich]

wow thanks so much, well this will go well in my Motorcycle, hope all goes to plan

[JA Prestwich]

Another JAP

Hi All, I have another JAP That needs an ID,, Numbers are ID/D/96762/9

[AFJ]

Hi All, I have another JAP That needs an ID,, Numbers are ID/D/96762/9

350cc side valve, cast iron piston/ made in 1934/

[JA Prestwich]

Thanks very much.
Ev