Year:
Mileage:999
Other Prestwich Speedway photos
Other Prestwich Speedway tech info
Type:Speedway race bike
Engine Size (cc):500
Warranty:Vehicle does NOT have an existing warranty
For Sale By:Private Seller
VIN:JOS
Other Prestwich Speedway description
JA Prestwich 500cc speedway bike. This bike came from Australia in approx 2003. It was taken off the track and stored. The frame is in its original nickel finish and is of Eric Langton design. Engine number JOS/H 78285. I believe this to be a 1951. Most recent previous owners were Rick Buckland, then Jason Bonsignore, (owner of 2 speedway tracks in upstate NY.) It at some point was converted to a Del-Orto carb. The bike starts and runs. Remember these speedway bikes are direct drive and have no brakes. In my opinion the bike should be left as is and not restored. It has a great look. The bike has been stored in a climate controlled environment since I purchased it. This bike is being sold in “as is” condition with no warranty or guarantee.. This is a great opportunity to obtain a piece of racing history at a very reasonable price. This is a race bike and does not have a title. Of course the bike will need to be paid for in full prior to shipping. All shipping costs will be the responsibility of the buyer. It will be shipped from southern Maine zip code 03901. Personal checks, bank drafts or cash are fine. Bike is listed in other places so auction might be ended early. following is some history about one of the great speedway racers and inventors, Eric Langton. The frame is of his design but has no markings to verify or trace back. http://www.motorsport-fanatic.co.uk/speedway-langton.htm here is a chart on Prestwich serial numbers: J.A.P. Engine Chart Compiled by Russell McIntyre of New Zealand U CZ/ D 97468/ B5 (1) (2) (3) (4) (5) Letter... Volume... Valves... Bore x Stroke (mm) A 300cc Side Valves 70x78 B 250cc Side Valves 64.5x79 E 375cc Side Valves 74x85 F 300cc Side Valves 70x76 G 350cc Side Valves 70x88 I 350cc Side Valves 70x90 J 500cc Side Valves 80x99 K 500cc Side Valves 85.7x85 L 550cc Side Valves 85.7x95 M 275cc Side Valves 70x97 N 200cc Side Valves 55x83 P 250cc Side Valves 62.5x80 S 350cc Side Valves 74x80 U 600cc Side Valves 85.7x104 V 175cc Side Valves 60x62 Z 175cc Side Valves 55x73 Engine Type: The next group of letters are often used in combinations of twos or threes. Letter... Type T Twin Cylinder O Overhead Values (cancels reference to side valves) W Water Cooled Z Dry Sump Lubrication S Short Stroke Sports Engine or Special C Sports Engine R Racing Engine Y Twin Exhaust Port Cylinder Head Letter... Year... Letter... Year... P 1920 P 1940 N 1921 N 1941 E 1922 E 1942 U 1923 U 1943 M 1924 M 1944 A 1925 A 1945 T 1926 T 1946 I 1927 T 1947 C 1928 C 1948 S 1929 S 1949 W 1930 W 1950 H 1931 H 1951 Y 1932 Y 1952 Z 1933 Z 1953 D 1934 D 1954 R 1935 R 1955 V 1936 V 1956 F 1937 F 1957 O 1938 O 1938 G 1939 G 1959 Note: Take into account the War Years during which machines for civilian use were no longer manufactured. It is worth noting that the J.A.P. production year ran from 1st September of the year previous to that identified by the dating letter, and ended on the 31st August of the year indicated.
Engine Identification, on Russell's GEM
600cc Sport engine with Dry Sump Lubrication, 1954 model made between 1st Sept,1953 to 31st August, 1954, serial no.97468 with deviation B5.
1) The first letter before the oblique (/) mark identifies the cubic capacity of the cylinder, or of each cylinder if the engine is a twin.
(2) The remainder of the letters before the oblique mark identifies the engine type.
(3) The first letter after the oblique identifies the year of manufacture
(4) The serial no. of the engine follows immediately after the letter identifying the year of manufacturer.
(5) Additional letters after another oblique stamped immediately after the engine serial no. identify any deviations from standard specification. An (*) after the serial no. indicates the engine incorporates parts, which deviate from the standard specification.
Cylinder Capacity (First Letter)
Note: The GEM 810cc Twin engine has two 405cc cylinders with a 3" Bore x 3-1/2" stroke and was made by Howard.
Year of Manufacture: Can help you date your Rotavator if original engine.
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