Contact Breaker Chart

MR Part NoLucas NoFits Distributor typesApplications
DR833400833 (ST361)DJ4, DJ6, Most models up to 1933. Distributors with no timing advance weights.
DR415400415DK4A, DKH4A, DK6, DK6A, DKH4, DKH4A
DJ4A, DJ6A, DJH4, DJH4A
Most models 1934-46
DR050407050DKYH4A 8E, MM, 10M  
1946 on

points and capaciter

Rotor Arm Chart

MR Part
No
Lucas NoFits Distributor typesApplications
DR032400833 403865DJ4, DJ4A, DJ6, DJ6A, DJH4, DJH4A 14/6, 25/6 1938-39
DR033400051 /
405468
DK4A, DK6,
DK6A, DKH4, DKH4A ,DKY4A, DKYH4A (clockwise)
All 8's, 10
series M, 12 series 3
DR034400052/405469DK4A, DKH4, DKH4A, DKY4A (anti-clockwise)1934/5 10/4, 1935 12/4, 10 & 12 series 2, 10/4 series 3
DR035403866DK6A (anticlockwise) 10/6 1935, 14 – 25 hp series 2
DR060R60D41, D61, D62, D63, DS4, DS6 distributorsMinor 1929-31 Minor, 1931/2 Major, 1930-31 Oxford 6 
rotor arms