The following table is the shim stack for a 1989 YZ250 with
a Race Tech Gold Valve kit installed. The shim stack is for a
200 lb rider with a 5.6 kg/mm spring. Dimensions are in mm.
Quantity |
Nut End Of Shaft |
Comments |
1 |
Nut |
This end considered up |
1 |
Backing Plate |
Check Valve |
2 |
1.02 x 22 |
Washer |
1 |
.25 x 22 |
Shim High Speed Rebound |
1 |
.25 x 24 |
Shim High Speed Rebound |
1 |
.25 x 26 |
Shim High Speed Rebound |
1 |
.25 x 28 |
Shim High Speed Rebound |
1 |
.25 x 30 |
Shim High Speed Rebound |
3 |
.25 x 34 |
Shim High Speed Rebound |
1 |
.10 x 23 |
Shim Low Speed Rebound |
5 |
.20 x 34 |
Shim Low Speed Rebound |
Piston |
Port with raised inset goes down | |
9 |
.20 x 38 |
Shim Low Speed Compression |
1 |
.15 x 23 |
Shim Low Speed Compression |
1 |
.25 x 38 |
Shim High Speed Compression |
1 |
.25 x 36 |
Shim High Speed Compression |
1 |
.25 x 34 |
Shim High Speed Compression |
1 |
.25 x 30 |
Shim High Speed Compression |
1 |
.25 x 28 |
Shim High Speed Compression |
1 |
.25 x 26 |
Shim High Speed Compression |
1 |
.25 x 24 |
Shim High Speed Compression |
1 |
.25 x 19 |
Shim High Speed Compression |
1 |
Base |