What spark plugs should I run?

[Lorcan]

Q. I can't get the recommended BR9EV spark plug any more, what plug should I use?

A. The BR9EV has been superseded by BR9EIX, in iridium plug. Many owners report that ordinary BR9ES work just as well (especially with Dyna grey coils) and are much cheaper, but this varies from bike to bike. Some owners report excellent results with the equivalent Denso plug.

[amdshaner]

Found this chart for BR9ES, not sure how accurate it is..

Possible spark plugs for NGK BR9ES:
AC Delco R42XL
AC Delco R41CXL
AC Delco S40XLR
AC Delco R41XL
AC Delco S41XLR
Accel ACCR9ES
Accel 142
Aprilia AP8206915
Aprilia 8206915
Autolite XS4062
Autolite 4062
Autolite 3703
Autolite 4063
Autolite 3702
Bosch W4CC
Bosch W3CC
Bosch WR3CC
Bosch W2CC
Bosch stk 7529
Bosch stk 7530
Champion QN2C
Champion NR2C
Champion RN2C
Champion QN2
Champion RN2
Champion OE091
Champion OE091/T10
Champion N2C
Champion stk 818
Champion stk 805
Denso W27ESR/W27ESR-U
Denso 4045
Denso W27ESR-U
Denso IW27
Denso 6069
Denso W27ESRU
Denso W27ESR
Denso stk 4045
Evinrude MCBR9ES
Fuji 065-01402-50
General Motors 5613388
General Motors 5613493
General Motors 5614068
H*nda 98079-59816
H*nda 98076-57720
H*nda 98079-59876
H*nda 98079-59847
Iskra FE100RS
Italjet 94029
Johnson MCBR9ES
Kawasaki E92070-1053
Kawasaki E92070-1109
Mercruiser 33-809679
Mercruiser 33-818
Mercruiser 33-809679B
Mercruiser 33-818S
Motorcraft AG071
Motorcraft stk 68
NGK stk 5722
Piaggio AP8206915
Splitfire SF406C
Suzuki 09482-00127
Suzuki 09482-00098
Suzuki 09482-00349
Tacti V91104045
Yamaha 94702 00188
Yamaha 94702-00188
Yamaha 90793-22037
Yamaha 94701 00188
Yamaha 94701-00188
Yamaha 94703-00188
Yamaha 94700-00261

[vr1203]

looks like BR9ES's are available ....as long as they are not fakes


https://www.ebay.com/itm/225708756833?e ... R8Kgid6-Yg

[Charlie @ Evergreen]

Use the BR9ES NGK's
Optional - BR9IEV Iridiums also work if want this type plug. Usually use the Iridiums with the Dyna Grey Coils when upgrading.

[vr1203]

Interesting sticker over the original spark plug gap specs in the owners manual, so what is the proper gap for the BR9ES when using stock coils? .5mm seems pretty small.

DSC03883.JPG (192.78 KiB) Viewed 878 times

[Charlie @ Evergreen]

Set them at .7 to .8mm or .030 . Did this and sure many others will chime in also. Used this spec on both the BR9ES and BR9IEX NGKs.

[vr1203]

thanks, I will do that , but I am wondering why the factory change to a smaller gap?

[Charlie @ Evergreen]

Because the BR9EV is a different material in plug design. They obsoleted it. Needed have closer gap for proper spark.