NEW for WINTER 2020

Note:  Pictures to the left represent the OEM CDI.  the Fireplug CDI is packaged in an aluminum housing (picture coming soon)

Our FIREPLUG CDI replaces Yamaha CDI models with 8R4 stamped on the box.

Over the years the 8R4 used terminals and plastic plugs (2 & 3 position).  We have all options if you inform us what type you have.


8R4 was offered with individual bullet terminals, a 2-position plug (shown) and a 3-position plug (shown below) fro the mid 80’s ~ 90’s. I

Let us know what configuration you have before ordering.

*FIREPLUG CDI to replace the 8R4 CDI used on YAMAHA snowmobile models from 1986 thru mid 90’s* .

This is a new CDI offering for a number of Yamaha sleds. If your CDI is stamped 8R4 on the end, or has white stampings such as (81E-MO 69R or 80F-MO) on the box, this is probably the replacement.   contact us to confirm.

This FIREPLUG CDI replaces CDI # 8R4 models with bullet connector and the other Yazaki type 2 & 3-position white plug models.   It is best to e-mail us a pic of your CDI / wiring colors & terminals before ordering.

More energy over stock OEM CDI.

Uses Factory OEM-style connectors & terminals for direct plug-in to factory harness.

NOTE: FIREPLUG CDI housing is similar in size to OEM and will fit into original rubber mounting boot-strap

*Follows OEM timing profile for true plug & play installation.

Best WARRANTY available!

MAY FIT THE FOLLOWING  (please confirm your model matches below & matches the terminal wiring in pictures before ordering)
1985/86 – 93 BRAVO
1987- ?  INVITER

Possibly fits other models into the 90’s.  Check for stamping on OEM CDI box for 8R4, then note the type of connectors used for fitment.

There was an added throttle position sensor wire that tied into the CDI kill-switch wiring.  This was a safety function to eliminate engine start if throttle wasn’t fully closed.  We do not include this function (Blk/Yel wire in plastic plug), however the Fireplug CDI will plug directly to your existing harness and operate otherwise.  It just won’t have the throttle cut-off feature available.

contact us before ordering if your model has this plug.

* Always check your timing when changing CDI’s to confirm it is set to factory specifications.

Additional information

Weight 1 lbs