KPMI Valve Seat - Powd Metal 44.6mm EVO BIG Twin 1984-1999/XL — Harley-Davidson (1980-2017)

KPMI Kibblewhite valve seat in powdered metal for Harley Sportster EVO Big Twin engines. Kibblewhite's proprietary material resists microwelding and seat recession while handling leaded, unleaded, methanol, and ethanol fuel blends with excellent thermal stability.

Features

• Kibblewhite proprietary powdered metal material
• Compatible with leaded and unleaded fuels, methanol, and ethanol blends
• Resists microwelding and valve seat recession
• Generous leading-edge radius for easier installation
• Excellent thermal characteristics

Specifications

• Brand: KPMI
• Manufacturer Part #: 10-SC446
• Length: 2.05 in
• Width: 3.55 in
• Height: 0.95 in
• Weight: 0.11 lbs

Fitment

Fits 1984-1999 Harley-Davidson Sportster (XL) models with EVO Big Twin engines.

Frequently Asked Questions

Will this valve seat work with ethanol fuel blends?

Yes. Kibblewhite's proprietary material is compatible with ethanol and methanol fuel blends, as well as leaded and unleaded gasoline.

What makes this seat resistant to recession?

The powdered metal material resists microwelding, which is the primary cause of valve seat and valve face recession over time.

Does this fit 2000 and newer Sportsters?

No — this part is for 1984-1999 EVO Big Twin Sportster models only. Newer Sportsters require a different seat.

Is installation difficult?

The generous radius on the leading edge helps ease installation into the cylinder head when grinding the seat pocket.