Yamaha FZR400 1WG Carburettors - Main Jet Square Ring

Also very similar for FZR250 2KR


Sq Rings
On the left is the standard Yamaha main jet square ring. It is a new part. On the right is the LiteTek part made from Viton 75.

Install Seal
1/ This is where we fit the square ring.
Install Seal
2/ Fit the square ring into the main jet recess.
Install Jet
3/ The main jet screws down and compresses the square ring.