pictures coming soon!
REPLACEMENT CDI for YAMAHA 1978~1981 Motorcycles
Verify 3M2-20 stamped on side of CDI box
Replaces Yamaha Models: (possibly others models within same years)
78-81 DT 175 (assume DT 125 also),
77-78 DT250/400, IT400 & YZ400
79-81 MX 175
80-81 YT, YTM 125, 175, 200
*Likely some IT models up to 465cc
(confirm your old CDI wires match listing below before ordering)
Plugs directly into the original OEM wiring harness. No wire splicing or cutting necessary. Mounts in original location using OEM strap.
This is the 6-wire CDI, using bullet type Male/Female terminals.
Follows OEM timing profile & harness. No timing change and no wire splicing required. A plug-n-play installation that will bring back the spark you’ve been missing!
Yamaha OEM Stator Values (+/- 10% is typical from service manual)
BROWN to BLACK = 300-ohms
RED/WHITE to BLACK = 10-ohms
TYPICAL VIEW OF STATOR USED WITH THESE MODELS
All FIREPLUG CDI’s have the unmatched FIREPLUG WARRANTY!
We also rewind stators & can recondition / rewire your complete ignition stator plate & harness system.
CONTACT US for details before ordering to discuss your application.
NOTE: It is always good practice to check / verify the ignition timing & carburetor jetting whenever making changes to your engine. The OEM CDI spark energy will have weakened over time. Weak spark will tolerate too advanced timing & very lean jetting. Once you have good spark energy, you may find the bike really responds to larger jetting with improved performance. More fuel equals more power! Verify timing & adjust as needed for your style of riding. Always best to use factory timing as starting point, then adjust from there.