| Also known as | JRC EW1, STK-100D-DC |
| Listed in parts books | Not catalogued by year yet |
CDI IGNITION - SINGLES BSA/TRIUMPH WITH LIGHTING COIL - EXTERNAL ROTOR
A CDI ignition conversion for BSA/Triumph singles with an external rotor and lighting coil setup.
This is a CDI ignition system built for BSA and Triumph singles that run an external rotor setup along with a lighting coil. JRC lists it under EW1, and you'll also see it turn up as STK-100D-DC in some supplier listings — same unit, different catalog number.
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CDI systems like this one replace the points-and-condenser setup with electronic triggering, which is the main draw for owners looking to get away from fiddling with contact breaker gap and timing drift. Because this version is matched to a lighting coil, it's meant for bikes that still need to run lights off the same source rather than a battery-only race setup.
Give us a call before ordering to make sure this matches your particular single's charging and ignition arrangement — external rotor magnetos and lighting coil setups vary enough across BSA and Triumph singles that we want to confirm fitment with you rather than guess.
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