Motobécane D45
| In brief : la MOTOBECANE D45 |
The Motobécane D45 is most certainly, along with its competitor the Peugeot type 55, the most popular machine in the history of French motorcycles.
|
 |
|
It appeared at the end of the war, in 1945. It was an economical, robust model with reliable mechanics. The engine, a 125cc single-cylinder four-stroke with side valves, was directly derived from the 100cc model published in the 1939 catalogue. On the first model, the D45A, the front suspension was a parallelogram, there was no rear suspension... it was the saddle that was responsible for absorbing road imperfections. The gearbox was a three-speed with a control lever placed at the front right of the tank.
With the following model, the rear suspension appeared, then a telescopic front fork. On the D45S model, the throttle control was finally a twist grip and, supreme refinement, the handlebar was fitted with a button for the horn!
The D45 was produced by Motobécane et Motoconfort (sous l'appellation B1) (under the name B1) until 1954.
|
This 1952 Motobécane D45S was restored by alain.salou.motos at orange.fr Alain .
Here is the summary of this restoration:
The motorcycle was purchased at the beginning of December 2000. The condition of presentation is acceptable, the mechanics: running, but without power.
Complete disassembly of the engine:
Replacement of the four bearings. (Crankshaft + box)
Replacement piston and rings
Cylinder bore
Repairing connecting rod assembly. (Replacement of needles)
Cylinder head and cylinder facing
Lapping valves
Complete cleaning of the housings
Complete carburetor cleaning. Add external filter
Repair of electrical circuit and replacement of rear light-code-lantern control
Brake light contact repair
Lighthouse dish reassembly
Ignition setting
Repair of paper gaskets and replacement of cylinder head gaskets
Disassembly of the front fork for seizure
Replacement of transmission shock absorbers
Rear tire replacement
Candle replacement
Replacement of kicker spring, and addition of locking ball
Replacement of front and rear brake linings
Front brake hose and cable replacement
Reduction of chain length by 2 links
Painting of mudguards, frame, plate, footrest
Fuel tap replacement
Approximate duration of work (one day per week on average plus one week of leave): 3 months or 16 days approximately, or a hundred hours.
This Motobécane D45S motorcycle now works very well.
Maximum speed: 65km/h.
Low oil and fuel consumption (2.5 liters per 100 km)
Motobécane D45 Specifications
Engine Single cylinder 4-stroke side valve engine
Bore x stroke 51 x 60 mm
Cylinder capacity 122.57 cc
Compression ratio 5.8:1
Regulating speed 2500 rpm
Maximum speed 5300 rpm
Gearbox 3 speed
Flywheel Magneto Novi 145 AAD
Front and rear tyres 25 X 3
Fuel tank capacity 9 L
Oil pan capacity 3/4 L
Maximum speed 65 km/h
Original version, in French Motobecane D45 (FR)
This is a translation of a page is from the Motocollection Archive
