Parts for Triumph, BSA & Norton·Worldwide shipping·Call the Shop: (657) 231-9003
Le Hangar 23
Shop/Category/Fig. 1 — CRANKSHAFT AND CONNECTING RODS/Rotor, type RM19
Rotor, type RM19
View clickable diagram
Details
DiagramFig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 21
Subsystemengine bottom
Listed in parts books1966–1967

Rotor, type RM19

Lucas-type RM19 energy transfer rotor that mounts on the crankshaft to generate ignition and lighting current.

PN · 54215824

This is the RM19 rotor, the magnetic rotor that spins with the crankshaft as part of the energy transfer ignition setup. It's listed here under the CRANKSHAFT AND CONNECTING RODS figure, which tells you it mounts on the crank and turns with it, working alongside the stator to generate the spark and lighting current on these energy transfer systems.

Read more

The catalog carries this one across appearances from 1966 to 1967, so it's tied to that generation of engines using the RM19 rotor rather than a later alternator setup. If you're not sure whether your engine runs RM19 or a different rotor type, give us a call before you order so we can confirm what's actually on your crank.

This one shows up under a Lucas-style number in our records, which is normal for electrical rotors of this type — the RM19 designation itself is the part to go by.

$142.49
Pin your bike to check this part fits.

Sorry if we got something wrong here. If you think this information isn't correct, .

Related parts
LOCK TAB WASHER ALTERNATOR ROTOR
PN 70-3975 · Usually replaced with this
BackorderView
NUT, ROTOR 9/16-20 T100 1957-68
PN 70-3735 · Goes with this
BackorderView
ROTOR KEY-500 HALF MOON
PN 70-3851 · Goes with this
BackorderView
DOWEL ET 500 ALT ROTOR
PN 70-4142 · Goes with this
BackorderView
Any questions about this part?

Ed is at the counter. Tell him what you're working on or what doesn't fit, and he'll take it from there with this part already on the bench.