KPMI Valve Stem Seal for Harley-Davidson

KPMI Valve Stem Seal 71002-4 for Harley-Davidson Panhead 1948-1965

$21.00

Quantity Pkg. of 4 Pkg. of 8 Pkg. of 16 Pkg. of 50 Pkg. of 100

KPMI solid white PC style valve stem seals are precision-engineered for builders requiring dependable performance in demanding engine environments. Manufactured from durable PTFE, these seals utilize mechanical creep to conform tightly to mating surfaces while specialized fillers enhance stability and reduce friction under extreme operating conditions up to 260°C.

Featuring an advanced twin-spring system with a body clasp and neck choker spring, these seals maintain continuous tension on both the valve guide and stem. Designed for select vintage motorcycle engines, they provide reliable oil control for both intake and exhaust applications.

Key Features

Brand	KPMI
Product Type	Valve Stem Seal
Type	Intake / Exhaust
Material	Solid White PTFE (PC Style)
Stem Diameter	9.5 mm (3/8")
Guide Diameter (A)	14.27 mm (0.562")
Seal Outer Diameter	16.5 mm (0.650")
Overall Length	13.2 mm (0.518")
Inside Depth (D)	9.3 mm (0.365")
Maximum Temperature	260°C (500°F)
Weight	0.05 kg

Highlights

High-performance solid white PTFE construction
Rated for continuous operation at temperatures up to 260°C (500°F)
Twin-spring system with body clasp and neck choker spring for continuous tension
Suitable for both intake and exhaust valve guides

Compatibility

Compatible with the following Harley-Davidson engine applications:

Panhead (1948–1965)
Shovelhead 74" (1966–1977)
Shovelhead 80" (1978–1983) – Requires valve guide modification with a 0.562" Ø x 3/8" pilot seal cutter

Downloads

KPMI® Seal Catalog

Frequently asked questions

What material is used to manufacture these valve stem seals?

These seals are made from solid white PTFE with added fillers to reduce friction and improve dimensional stability at temperatures up to 260°C (500°F).

Which engine models are compatible with these seals?

They fit Harley-Davidson Panhead (1948–1965), Shovelhead 74" (1966–1977), and Shovelhead 80" (1978–1983) engines.

Is machining required to install these on Shovelhead 80" engines?

Yes, for Harley-Davidson Shovelhead 80" (1978–1983) models, the guides must be modified using a 0.562" diameter by 3/8" pilot seal cutter.

Can these seals be used on both intake and exhaust valves?

Yes, they are designed for use on both intake and exhaust positions.