High Performance Valve Springs for the:
VFR 750R RC30 - all years
 
Single Spring Kit includes 16 Valve Springs and 16 Spring Bases.
Compatible with all other stock parts - including the original spring retainers and ABUSO Titanium Retainers
 
Valve Spring Specifications:
Installed Height: 34,3mm (using the spring bases supplied)
Seat Pressure: 50lbs / 22,1 Kgf
Open Pressure (10mm): 145lbs / 64,5 Kgf
Max. Recommended Lift: 0,395” / 10,0mm
 
This spring kit converts the original round wire double springs to an oval wire single spring that greatly reduces spring mass (43g vs 31g), improving harmonics and RPM potential.
 
These ABUSO valve springs are made of Oval Wire which is a far superior solution enabling higher forces and spring pressures with lower stress (more durability) as well as more valve lift as a consequence of a reduction in spring solid lenght.
Oval wire is the latest and most significant development in valve spring technology and is used by OEM manufacturers in their highest performance models.

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.

We also offer a valve spring shim kit to adjust the installed height according to the engine builder preference. Shim kit has 32 shims (16 x 0,5mm and 16 x 1,0mm).

We also have Stainless Steel valves, Titanium Retainers and Bronze Valve Guides for the VFR 750
 
Part Number
14751MR7003 / 14751 MR7003
14761MR7003 / 14761MR7003