AchillesGr

iTrader: (1)

hi Guys,
a few months ago i ordered a rear counterweight for my Fd because i wanted to fit it with a light weight flywheel.
i ordered the N351-11-521 counterweight and i received a counterweight with the N3Y2-11-52X part number.
for my litle research i found that this counterweight is for the 86-88 model.
what is going on? do the 86 counterweight fits the fd or it is a mistake?
can someone please let me know what the two counterweight weights?
thanks
i apreciate any help
achiles

Banzai-Racing

iTrader: (11)

Do not put the S4 CW on your FD engine. It is not weighted the same and will cause your rotating assembly to be out of balance.

DaleClark

iTrader: (55)

Mazdatrix.com has a guide to all the counterweights with pictures of them so you can tell them apart.

Hit up the 2nd gen for sale section, the '89-91 auto tranny counterweight is the same as the FD's counterweight and they go cheaper .

Dale

AchillesGr

iTrader: (1)

hi Guys,
thanks for the reply. can someone please vereify that the N3Y2-11-52X is the 86-88?is this the s4 for soure?
i find that there are two versions : the 86-88 and 89-92.
thanks

FD7KiD

iTrader: (8)

as per racing beat:

1986-88 13B All (Mazda # N3Y8-11-52X)
1989-95 13B All (Mazda # N3Y2-11-52X)
2004-11 13B RX-8 (Mazda # N3Z2-11-52X)

Sgtblue

iTrader: (16)

Or get a micrometer and measure the flange width to be certain....
https://www.mazdatrix.com/faq/Rcounterweights.htm