RACING SEAT VALVE SPRING 2 HPSP LC135 2.0 2.5 3.0 3.5 4.0 4.5mm

HPSP Racing valve spring seat for the Yamaha LC135, used to set valve spring installed height/preload when fitting racing valve springs on a modified cylinder head. Offered in six thickness options from 2.0mm to 4.5mm.

• HPSP Racing "High Performance" line part
• Thickness options: 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm
• Used to fine-tune valve spring seat height on racing head builds
• Sold per thickness - select to match your spring/head spec

Brand

HPSP Racing

Product

Racing valve spring seat

Model/SKU

LC135 Valve Spring Seat

Type

Valve spring seat/shim

Main spec

2.0mm / 2.5mm / 3.0mm / 3.5mm / 4.0mm / 4.5mm thickness

Compatibility

Yamaha LC135 cylinder head, racing/modified valve spring setups

Thickness should match your valve spring's free length and your head's installed height spec - the wrong thickness can over-compress or under-seat the spring. Confirm the correct thickness with your engine builder based on the spring you are pairing it with.

Fitting requires cylinder head disassembly with a valve spring compressor, done by an experienced mechanic/engine builder. Package includes the valve spring seat(s) for the thickness ordered; springs, retainers and collets are sold separately unless stated.

HPSP Racing valve spring seat for LC135, offered in 2.0-4.5mm thickness options for racing head builds.