Raleigh / J.A.P.

At Brooklands Museum September 2006

Raleigh / J.A.P.

The Raleigh Cycle Co. Ltd, Nottingham  / J.A.Prestwich & Co. Ltd, London
                     In about 1991 we heard about a J.A.P. engine for sale at the
 Warnham Military Museum.
                     Hoping it was a v-twin we went along to find the single cylinder 
ex Cotton engine you see below.


Rebuilding it into a Cotton was soon found to be impractical so another chassis was sought.
In 1993 a rolling Raleigh MA 32 chassis of 1932 vintage with V5 was purchased from Eric Patterson. As the bike would now be very non-standard, it was decided to build it as a replica racing bike as used at Brooklands (this also saved having to find and fit lights, battery and dynamo.)
 With no deadline for the project, completion took over 10 years as parts were collected and overcoming the problem of making a 24" tall engine fit into the Raleigh frame.
The bike starts and handles well apart from right hand corners where the exhaust needs
to be reshaped to give more clearance.
( Note: exhaust was re-shaped in the summer of 2012 see photos below )
Ground clearance is poor due to height of the engine touching the top frame rail as it does which gives only 3-1/2" ground clearance at the sump, so speed bumps are a problem.
        The Raleigh/J.A.P. finally made the road in 2003.
        We have in a box on the shelf a set of J.A.P. racing cams but that's for another day.

Engine J.A.P. KOZ/O 500cc single ohv  4-stroke petrol
Gearbox Sturmey Archer 3-speed hand change

In the paddock at Brooklands. September 2006.

The Rolling chassis at Eric's an unfinished sprinter with another J.A.P. 
engine which was removed and sold by him.

                           Circa 1995/1996
Trying to get that long engine into a space at least 2" too short for it 
and the spacing for the chain runs.


March 2001
Most of the main parts are together still sorting out gearbox hand change lever ,
cables,fuel/oil lines and soon off to have exhaust built. 

September 2006
Start/Finish Straight Brooklands Museum

Over the summer 2012 the rockers where stripped and new needle rollers fitted.

 With a lot of help from Mark and his TIG welder the exhaust   was finally re-shaped in the summer of 2012 . 
 The bike can now take right hand corners without lifting the     back wheel off the road !!