I've never seen an AP1 flywheel like this...

 

how much does it weigh ?

 

Looks like an OEM AP1 flywheel to me. (I've changed probably around 40-50 S2000 clutches, so I am very familiar with them.)

Here is a thread to back up my claim. You can see the clear differences between AP1 and AP2 flywheels and the identifiable casting differences that make yours an AP1.

https://www.s2ki.com/s2000/topic/106...l-differences/

 

It weighs 11-12 lbs

 

Looks like chromoly/aftermarket. Oem flywheel is cast.

 

Ah yes, it is indeed. I didn't catch that with the rust on there. With it being 11-12 pounds I can't say for sure what brand it'd be. It's very similar in shape to the AP1 OEM flywheel. Fidanza maybe?

 

That's why I posted because I've never seen one with side before:

 

Weighs exactly 11.2

 

Bottom line, any chromoly flywheel you run will be great. I would definitely use it.

Find some one to properly "step grind" the flywheel.

1 measure current step-height
2 remove dowel pins
3 grind friction surface
4 grind PP mounting surface to original step-height
5 re-install dowels

Stay away from aluminum flywheels.

 

The Flywheel is Not Chrome Moly! If it was it would weigh about 5 lbs. its cast dirty OEM flywheel! It needs to be lathed and wiped (cleaned) prior to install.