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

 

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.

 

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

 

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

 

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)

 

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