High Performance Valve Springs for the:
Kawasaki GPZ 900R 1984 - 2003
Kawasaki GPZ 1000 RX 1986-1987
 
Dual Spring Kit includes 16 Outer Springs and 16 Inner Springs
Compatible with all other stock parts.
 
Intake Valve Spring Specifications:
Installed Height: 37,0mm (same as stock)
Seat Pressure: 48lbs / 21,3 Kgf
Open Pressure (10mm): 154lbs / 68,3 Kgf
Max. Recommended Lift: 0,395” / 10,0mm
 
Exhaust Valve Spring Specifications:
Installed Height: 36,0mm (same as stock)
Seat Pressure: 57lbs / 25,5 Kgf
Open Pressure (10mm): 166lbs / 73,7 Kgf
Max. Recommended Lift: 0,395” / 10,0mm
 
ABUSO Valve Springs are ideal for modified engines providing higher seat and open pressures while allowing for more valve lift. This ensures better valve control when using more aggressive camshaft profiles and increased RPM and valve lift.

ABUSO Springs are made from Super Clean oil-tempered Chrome Silicon Vanadium Steel Alloy sourced from Japan, especially intended for the manufacture of valve springs requiring very high fatigue properties. Fatigue resistance is further improved by multistage heat treatment and shot peening.
Our springs are Progressive Wound to optimize spring dynamics and avoid harmonic resonance that can lead to valve float and premature valvetrain wear.
 
Part Number
490781069
490781067