S&S 33-4242 Steel Breather VALVE. +.030" Od
+.030" oversize steel breather valve. Used to save worn or damaged crankcases. Okay for stock or high performance replacement. Note: JIMS has a +.030" breather hole reamer tool which is available as 978343. Note: that steel breathers require steel breather valve spacers. Plastic breathers require plastic spacers. Do not intermix steel and plastic parts. Note: S&S breather valves come with elongated breather holes to increase the duration of the vacuum, allowing more oil to be drawn from the cylinder heads. This has no disadvantage in any model year, either stock or Big Inch motor. Tech tip: The timing for S&S breather valves, only for late 77-99 Big Twin models, has been changed by S&S in the year 2000. This is done to improve oil scavenging and reduce oil carry-over in high performance / large displacement engines. Old opening was at TDC and closing at 65° after BDC. New opening is 17° after TDC and closing at 82° after BDC. The old timing specification can be obtained by installing the timing mark on the breather gear one tooth clockwise from the timing mark on the cam gear. Also the breather's cavity oil evacuation hole (opposite of the drive gear), which used to be a round hole, has been elongated (made longer) to increase the duration of suction to the crankcase breather 'settling' cavity. The new specifications are not useful in most stock engines, but harmless. Breather windows in S&S cases will typically open at 7° after TDC and close 92° after BDC. Builders using other crankcases may modify crankcase breather opening to obtain these specifications for maximum breather efficiency and performance.
L77-99 B.T. (EXCL. TC)
Specifications-
Material: Steel
Features: Oversized (+.03")
Type: Breather
Units: Each
Product Name: Gear
HARLEY DAVIDSON
FL 1200: 1977
Electra Glide - FL 1200: 1977
Electra Glide - FLH 1200: 1977-1980
Electra Glide - FLH 1340: 1979-1984
Electra Glide - FLHC: 1979-1983
Road King - FLHR: 1994-1999
Road King Classic (EFI) - FLHRCI: 1998-1999
Road King (EFI) - FLHRI: 1996-1997, 1999
Electra Glide - FLHS: 1979-1980, 1988-1993
Electra Glide Standard - FLHT: 1983-1987, 1996-1999
Electra Glide Classic - FLHTC: 1983-1998
Electra Glide Classic (EFI) - FLHTCI: 1996-1999
Electra Glide Ultra Classic - FLHTCU: 1989-1997
Electra Glide Ultra Classic (EFI) - FLHTCUI: 1995-1999
Electra Glide - FLHTE: 1984
Softail Heritage - FLST: 1987-1990
Softail Heritage Classic - FLSTC: 1988-1999
Softail Fat Boy - FLSTF: 1990-1999
Softail Deluxe - FLSTN: 1993-1996
Softail Heritage Springer - FLSTS: 1997-1999
Tour Glide - FLT: 1980-1983
Tour Glide Classic - FLTC: 1980-1991
Tour Glide Ultra Classic - FLTCU: 1989-1996
Road Glide - FLTR: 1999
Road Glide (EFI) - FLTRI: 1998-1999
Super Glide - FX: 1977-1979
Sturgis - FXB: 1980-1982
Dyna Super Glide - FXD: 1995-1999
Dyna Glide Daytona - FXDB : 1992
Dyna Glide Sturgis - FXDB: 1991
Dyna Super Glide Custom - FXDC: 1992
Disk Glide - FXDG: 1983-1984
Dyna Low Rider - FXDL: 1993-1999
Dyna Convertible - FXDS-CON: 1994-1999
Dyna Wide Glide - FXDWG: 1993-1999
Dyna Super Glide Sport - FXDX: 1999
Super Glide - FXE: 1977-1984
Fat Bob - FXEF: 1979-1986
Low Rider Custom - FXLR: 1987-1994
Super Glide - FXR: 1982-1984, 1986-1994
Super Glide - FXR2: 1999
Super Glide - FXR3: 1999
Low Glide Custom - FXRC: 1985
Sport Glide Grand Touring - FXRD: 1986
Disc Glide - FXRDG: 1984-1985
Pursuit Glide - FXRP: 1984
Low Rider - FXRS: 1982, 1984-1993
Low Rider Sport - FXRS-SP: 1987-1993
Low Rider Convertible - FXRS: 1989-1993
Low Glide - FXRS: 1982, 1984-1985
Super Glide II - FXRS: 1982
Sport - FXRT: 1984-1992
Low Rider - FXS 1200: 1977-1979
Low Rider - FXS 1340: 1979-1983
Low Rider - FXSB: 1984-1985
Softail - FXST: 1985-1999
Softail Night Train - FXSTB: 1998-1999
Softail Custom - FXSTC: 1986-1998
Softail Springer - FXSTS: 1988-1999
Softail Bad Boy - FXSTSB: 1995-1997
Wide Glide - FXWG: 1980-1986
