Carpenter Racing

Carpenter Valve Springs Kawasaki ZX10R (04-15)

Carpenter Racing Valve Springs are 60psi on the seat and can handle the largest cams available for the Kawasaki ZX10R. Designed for use with the stock retainers.

Carpenter Valve Springs Kawasaki ZX12 (00-05)

Carpenter Racing Valve Springs are 65psi on the seat and can handle the largest cams available for the Kawasaki ZX12.

Carpenter Valve Springs Kawasaki ZX14R (06-24)

Carpenter Racing Valve Springs are 62psi on the seat and can handle the largest cams available for the Kawasaki ZX14R. Designed for use with the stock retainers. Also works on 2004 - 2015 ZX10R 60lb on the seat.

Carpenter Valve Springs Suzuki GSXR1000 (01-08)

Carpenter Racing Valve Springs are 50psi on the seat without the stock spring base and 60psi with it. They can handle the largest cams available for the Suzuki GSXR1000. Designed for use with the stock retainers.  Used by many engine builders...

Carpenter Valve Springs Suzuki GSXR1000 (09-25)

Carpenter Racing Valve Springs are 60psi on the seat and can handle the largest cams available for the Suzuki GSXR1000. Designed for use with the stock retainers.

Carpenter Valve Springs Suzuki Hayabusa (99-24)

Carpenter Racing Valve Springs are the most popular valve spring for the Suzuki Hayabusa and will work with cams up to .445" lift with stock or aftermarket retainers. The 60psi springs are recommended for nearly all application including all motor and...