Rex-Rx7

iTrader: (1)

Hello can anyone help me with this Q? if you feel the need to school me go for it!


i have a na 1990 gtu shell and doing a t2 swap.
i have the motor,trans,diff,halfshafts,and driveshaft.
i got a LT-10 microtech ecu kit.

thats the main info.

So the thing is, i have a used OS giken supersingle clutch with no rear counter weight

my car was made in 8/89 and the motor i got was a S5
do i need to change both front and rear to match the same weight (pounds)

this is what im reading off rhdjapan

Use genuine Mazda counter weight of pn: N327-11-521A, and bolts of pn: 8051-27-236 (or 8501-27-235) for chassis No. 0 thru 200000 (before minor change).

Use genuine Mazda counter weight of pn:N351-11-521, and bolts of pn:8051-27-236 (or 8501-27-235) for chassis No. 200001 and on (after minor change).

OPTIONAL PARTS: Adjustable fork kit (returns release fork to the position with the spring)

Brand: Mazda
Product : Rotary Counterweight
Part Num. : N327-11-521A (FC3S Zenki) ?
Part Num. : N351-11-521 (FC3S Kouki FD3S) ?
Part Num. : N3Z2-11-52X (SE3P)

do the chassis no. still count for NA rx7 cars

FelixIsGod29X

iTrader: (50)

Its as easy as this. If the motor is an S5 then use an S5 auto counterweight.

But your saying "OS giken supersingle clutch with no rear counterweight"

Clutches don't have counterweights, flywheels do. (stock flywheels have the CW built into them so to say)

If your saying your installing a lightweight flywheel but need a counterweight then get a S5 auto counterweight for your S5 motor. Funny, i just sold my S5 counterweight the other day.

The conterweight on the front cover does not need to be touched.

Rex-Rx7

iTrader: (1)

word... yea i meant the flywheel

what im thinking is not coming out right

but thanks alot for the info

i used to lived in ronkonkoma long island. nothing but NY love

thanks again Pete

RotaryResurrection

iTrader: (8)

Always use the rear counterweight that matches the year of the engine (or rotors inside if custom built).