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My Store
Open Tomorrow At 10am
3635 West Broad Street
Columbus, Ohio 43228
614-869-3115
What’s going on at Cycle Gear
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Experienced staff support available on site
Store Events
Meet the local riding community for Bike Nights & more
Shop the Store
Find out what’s in stock and ready to go
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Uh oh - Our system doesn't think this part will fit your 1980 BMW R80G/S (change vehicle selection)

S&S Crankcase Reed Breather Valve For Harley Evo Big Twin

If you're fire-breathing stroker monster keeps weeping oil, perhaps your weak plastic rotary gear is to blame. S&S developed this reed-style breather that has no gear - crankcase pressure actually opens it up. Installation is a snap - slide it into the cavity, and button your cam chest back up. There are no marks to align, and no rotating parts. Thoughtfully, S&S also offers this part in an .030" oversize version for those who have scored cases from their nylon breathers. If that's the predicament you find yourself in, you can have your machinist open up the breather bore, install the Reed Breather Valve, and put your engine cases back into service!

Features:

  • Breather is not dependent on the rotation of the crankshaft to make it open and close; instead, reeds open when the pressure in the crankcase becomes greater than the pressure in the cam chest and close when the pressure in the cam chest is equal to or greater than the pressure in the crankcase
  • By opening and closing "on demand," the reed valves automatically compensate for the lag time associated with accelerating the mass of air as it is forced out of the crankcase, increasing performance and stopping high-rpm oil carryover in engines with marginal piston ring seal
  • Installation is fast and simple; no aligning timing marks and no rotating parts
  • Made in the USA
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Uh oh - Our system doesn't think this part will fit your 1980 BMW R80G/S (change vehicle selection)

Fitment Notes & Exceptions
  • These parts require a good deal of technical skill to install correctly - it is the responsibility of the person assembling the parts to check all clearances and assembly specifications
  • Item is for head-breathing engines only - please verify before ordering

This Product Fits:


Harley Davidson
Dyna Convertible FXDS 1994, 1995, 1996, 1997, 1998
Dyna Low Rider FXDL/I 1993-1998
Dyna Super Glide FXD/I 1995, 1996, 1997, 1998
Dyna Wide Glide FXDWG/I 1993-1998
Electra Glide Classic FLHTC/I 1993-1998
Electra Glide Sport FLHS 1993
Electra Glide Standard FLHT/I 1993-1998
Electra Glide Ultra Classic FLHTCU/I 1993-1998
FXR2 CVO/SE 1999
FXR3 CVO/SE 1999
FXR4 CVO/SE 2000
Low Glide/Low Rider FXRS 1993
Low Rider Custom FXLR 1993, 1994
Low Rider Sport FXRS-SP 1993
Road Glide FLTR/I 1998
Road King Classic FLHRC/I 1998
Road King FLHR/I 1994, 1995, 1996, 1997, 1998
Softail Bad Boy Springer FXSTSB 1995, 1996, 1997
Softail Custom FXSTC/I 1993-1999
Softail Deuce FXSTD/I 1999
Softail Fat Boy FLSTF/I 1993-1999
Softail Heritage Classic FLSTC/I 1993-1999
Softail Heritage Springer FLSTS/I 1997, 1998, 1999
Softail Night Train FXSTB/I 1999
Softail Nostalgia FLSTN/I 1993
Softail Special FLSTN/I 1994, 1995, 1996
Softail Springer FXSTS/I 1993-1999
Softail Standard FXST/I 1999
Super Glide FXR 1993, 1994
Tour Glide Ultra Classic FLTCU/I 1993, 1994, 1995, 1996
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style Standard Item # 958844 Store SKU Manufacturer Product # 31-2096 Availability In Stock: Ships within 24 hours
Product Style +.030" Oversize Item # 958845 Store SKU Manufacturer Product # 31-2100 Availability In Stock: Ships within 24 hours
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