Tapered rocker arm shaft spring

• This Ducellier distributor, without a vacuum capsule, uses the original curve of the Ducellier 4137A distributor, except for the absence of a socket for a mechanical rev counter.
• Advance curve in "Distributor revs": 2° at 350 rpm / 5° at 800 rpm / 11° at 1400 rpm
• To measure engine revs on the vehicle,multiply the revs and degrees by x2.
• The curve of this distributor is adapted to SP98 gasoline.
• Ideal for engines prepared with Kit 904cm³.

Intake pipe Ø 33mm

Exhaust pipe Ø 29mm

Fixing offset holes

Bearing Dimensions:

• Dimension: Stock Dimension (Standard)
• Junnel Diameter (A): Ø 39.99mm
• Housing Diameter (B): Ø 44.01mm
• Bearing Width (C): 27.13mm (x2)
• Bearing Width (C): 30.12mm (x2)
• Bearing Width (C): 32.87mm (x2)
• Bearing Thickness (D): 1.99mm
• Smooth, lug-type bearings with grease holes (x4) and grooves (x6)
• Bearing material:Bi-metal

Need two silentblocs per gearbox control.

Provide a shaft extension on the igniter drive pinion side, possibility of making it with the old pump shaft (provide about 28mm)