Flywheel help
 

I have these 2 flywheels that both fit a 12a e-shaft, one I know came stock on an 83 12a (flywheel on left), but the other one I have no idea which model its for.... it fits on the 12a e-shaft. But it doesn't look like it has any counter weight? Any help would greatly be appreciated. I could take other pictures if it would help. Flywheel on left has 31 on it. Flywheel on right has 21 on it.

Thanks
adam

The one on the right is an '82 or older flywheel.

Another thing.... would be front counter weight... Would the difference between the 83-85, and 79-82 be that the earlier 79-82 front counter weight be squared off as oppose to the later 83-85 counter weight that has a bevel towards the motor... I could post a pic if I am not making sense

Thanks
adam

http://www.mazdatrix.com/faq/flywheel.htm

Please post a pic so we can tell you which is which. BTW, you know you can only use the early FW and CW with pre 83 rotors. And the 83 FW and CW only with 83-85 rotors.

http://www.mazdatrix.com/faq/rotorwgt.htm

This pic on Mazdatrix's website looks like the '83-'85 style front counterweight (or possibly '82). Is this what you have (bevel and all)?
https://www.rx7club.com/forum/attach...postid=1689370

In the picture the Front Counterweight on the right is the one that I know comes of an 83, that would make it 83-85 only right? now the FC on the left is the counterweight that I am trying to find out what year it would go to. They say a picture is worth a thousand words take a look tell me what you think.... its not the 180º counterweight (what year could that be from)79-80.

I know there are 3 diff types or counterweights for the stock n/a 12a 76-80, 81-82, and 83-85.

Could the shape of the weights changed in the 83-85 period.

Thanks
adam

Maybe this will work

Sorry its the counter weight on the left that comes form the 83... I am trying to find out what year the counter weight on the right is....

Yes, the left is '83-'85. The right one is '82 and probably '81. I'm assuming '79-'80 are 180º style since I've never torn down on of those.