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31-2100 Reed Valve

£184.06 SAVE £27.61 (15%)
£156.45

incl. VAT

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Stock updated: 17 Jul 2026
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Estimated delivery: 3–15 working days

Part #: 31-2100 | Pack: EA

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Specifications

Brand
S&S
Part Number
31-2100
OEM Reference
Pack Quantity
Sold as ea
Category
0920-CRANKCASES + PARTS
VAT Rate
20%

About This Product

This S&S Cycle breather reed valve assembly is designed with a +0.030 inch oversize for crankcases that have been machined or have worn breather bores. The reed valve design replaces the stock rotary breather, offering a more responsive method of managing crankcase pressure. By utilizing a reed petal system, this valve improves oil return and reduces the amount of oil mist expelled through the breathers. It is an excellent solution for engine builders looking to modernize the breathing system of a vintage or performance crankcase while correcting bore wear. This product is sold individually.

Manufacturer part number: 31-2100.

Fitment

34 models
Cvo/Custom
2 models
Brand Year Model
Harley-Davidson 1999 Super Glide Screamin Eagle FXR3
Harley-Davidson 1999 Super Glide Screamin Eagle FXR2
Dyna
5 models
Brand Year Model
Harley-Davidson 1993–1999 Dyna Low Rider FXDL
Harley-Davidson 1995–1999 Dyna Super Glide FXD
Harley-Davidson 1994–1999 Dyna Super Glide Convertible FXDS-CON
Harley-Davidson 1999 Dyna Super Glide Sport FXDX
Harley-Davidson 1993–1999 Dyna Wide Glide FXDWG
Fxr
4 models
Brand Year Model
Harley-Davidson 1993 Low Rider Convertible FXRS
Harley-Davidson 1993–1994 Low Rider Custom FXLR
Harley-Davidson 1993 Low Rider Sport Edition (Fxrsl) FXRS-SP
Harley-Davidson 1993–1994 Super Glide FXR
Softail
9 models
Brand Year Model
Harley-Davidson 1995–1997 Bad Boy FXSTSB
Harley-Davidson 1993–1999 Fat Boy FLSTF
Harley-Davidson 1993–1999 Heritage Softail Classic FLSTC
Harley-Davidson 1993–1996 Heritage Softail Special/Nostalgia FLSTN
Harley-Davidson 1997–1999 Heritage Softail Springer FLSTS
Harley-Davidson 1999 Softail FXST
Harley-Davidson 1993–1998 Softail Custom FXSTC
Harley-Davidson 1998–1999 Softail Night Train FXSTB
Harley-Davidson 1993–1999 Softail Springer FXSTS
Touring
14 models
Brand Year Model
Harley-Davidson 1999 Electra Glide FLHT
Harley-Davidson 1993–1998 Electra Glide Classic FLHTC
Harley-Davidson 1996–1999 Electra Glide Classic FLHTCI
Harley-Davidson 1993 Electra Glide Sport FLHS
Harley-Davidson 1996–1998 Electra Glide Standard FLHT
Harley-Davidson 1993–1997 Electra Glide Ultra Classic FLHTCU
Harley-Davidson 1996–1999 Electra Glide Ultra Classic FLHTCUI
Harley-Davidson 1995 Electra Glide Ultra Classic Special Anniversary Edition FLHTCUI
Harley-Davidson 1998–1999 Road Glide FLTRI
Harley-Davidson 1999 Road Glide FLTR
Harley-Davidson 1994–1999 Road King FLHR
Harley-Davidson 1996–1999 Road King FLHRI
Harley-Davidson 1998–1999 Road King Classic FLHRCI
Harley-Davidson 1993–1996 Tour Glide Ultra Classic FLTCU

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Who are we? Leeds Harley-Davidson - Iron City Motorcycles

Who are we? Leeds Harley-Davidson - Iron City Motorcycles

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