1936 J.A.P. JA Prestwich 250cc SV Side Valve vintage motorcycle engine.
Turns over and has the external oil pump fitted. As I turn it by hand, I can hear to piston rising and falling.
This appears to be a 1936 J.A.P Side valve engine. The engine number (shown in the images) begins with the letters BY/V.
B is for a 250 cc. 64,5 x 76 mm.
Y is not something that I have managed to work out yet. Perhaps it denotes long stroke? There are KY and LY engines (500cc and 550cc).
V is the year date, 1936
JAP supplied engines to many motorcycle manufacturers. So, if you need a 250cc SV J.A.P engine for your vintage motorcycle project, this is a good place to start.
Overall, it’s in very good condition but consider it as an engine requiring checking over at the very least and possibly a rebuild. It is missing a few nuts and machine screws. Look at the valve springs as there’s a few small parts missing. I have shown inside the timing cover too. Take note that the exhaust valve arm is missing.
The engine case halves have matching numbers, indicating that the engine cases are original matched pair.
What you see is what you get.
International shipping available. Please ask. Shipping is charged separately from the item.
Combined shipping available if you buy more items at the same time.
Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.
Shipping: I usually ship to most destinations. If you don’t see a price, please ask. Thanks. International shipping available.
Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.
Payment: Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well.
Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.