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for Evolution Big Twin Engines
Gaskets for Top End
James Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore
James Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore
Select variant:
fits Big Twin 1984-1998, Softail 1999, Sportster 1200 cc 1988-2020; metal/graphite compound; 0.045” thick; with O-rings 0.081”; replaces OEM HD 16770-84, and 16773-85
fits Big Twin 1984-1998, Softail 1999, Sportster 1200 cc 1988-2020; metal/graphite compound; 0.062” thick; with O-rings 0.081”; replaces OEM HD 16770-84, and 16773-85
fits Big Twin 1984-1998, Softail 1999, Sportster 1200 cc 1988-2020; metal/graphite compound / silicone; 0.045” thick; with O-rings 0.081”; replaces OEM HD 16770-84, and 16773-85
fits Big Twin 1984-1998, Softail 1999, Sportster 1200 cc 1988-2020; metal/graphite compound; 0.032” thick; with O-rings 0.081”; replaces OEM HD 16770-84, and 16773-85
fits XR1200X 2009-2013; metal/graphite compound / silicone; 0.045” thick; replaces OEM HD 16771-08
Price and stock:
Item №
55-416
Price incl. VAT
19.94 €
Available
49
Ready for immediate delivery from our Würzburg, Germany warehouse
The price includes 3.18 € German VAT.
- Gasket »Firering« by James Gaskets
- for Cylinder head
- fits Big Twin 1984-1998, Softail 1999, Sportster 1200 cc 1988-2020
- metal/graphite compound
- nominal bore: 3-1/2 ”
- 0.045” thick
- with O-rings 0.081”
- replaces Harley-Davidson part number HD 16770-84, and 16773-85
- gross weight: 20 g
Firering Gaskets
Thermally high stressed areas of the gasket — like the gap between cylinder barrel and head — are sheathed by a metal reinforcement ring.
Thin Head Gaskets
An easy way to increase compression ratio a tad is to install thinnner head gaskets. A snappier exhaust note and a more efficient combustion can be expected.
Example: using a .030" head gasket in lieu of a .045" will increase compression by approx. 0.25 points. So if your CR with a .045" head gasket is 9.6, the static CR will increase to 9.85 with a .030" head gasket. Valve to piston clearance must be checked where appropriate.
Accessories:
57-103
O-Ring by James Gaskets; for Cylinder to Head Centering Dowels Big Twin Evolution, Sportster 1986-2007, Buell →2007, Engine Case Halves Centering Dowel Dyna and Touring 1999-2007, Softail 2000-2008, Check Valve XR1200X; rubber; ID x OD: 13.5 x 17.5 mm, 2 mm thick; replaces OEM HD 26432-76; gross weight: 10 g
57-072
O-Ring by James Gaskets; for Cylinder to Head Centering Dowels Big Twin Evolution, Sportster 1986-2007, Buell →2007, Engine Case Halves Centering Dowel Dyna and Touring 1999-2007, Softail 2000-2008, Check Valve XR1200X; rubber; ID x OD: 14.5 x 17.5 mm, 1.5 mm thick; replaces OEM HD 26432-76; gross weight: 2 g
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com