9000 Hatchback L4-2290cc 2.3L DOHC Turbo EFI (1994)
Both the sprockets and the idler-wheel sprocket incorporate thrust rings to help minimize chain noise. The thrust rings absorb the force of the chain
where it engages the sprocket teeth, providing smoother operation and thus more silent operation. Because the surface contact angle of the chain is
smaller on the exhaust side, the thrust rings on this side are larger.
