Moroso Air/Oil Separator - V-Twin Univ. Breather — Harley-Davidson Electra Glide Ultra Classic, Softail Heritage Classic, Softail Fat Boy (1991-2017)

Moroso air-oil separator keeps crankcase vapors, oil mist, and moisture out of your intake system instead of routing them back into the engine like factory breather designs. The two-piece canister collects separated oil for easy cleaning, and vents internally rather than to atmosphere, so no oil ends up on your bike or the ground.

Features

• Filters crankcase vapors, unburnt fuel, and moisture before re-entry to engine
• Reduces detonation and knock from contaminated intake charge
• Two-piece design unscrews for easy cleaning and service
• Internal venting keeps oil in the canister, not on your bike or ground
• Proudly made in the U.S.A.

Specifications

• Brand: Moroso
• Manufacturer Part #: 85711
• UPC: 84663857119
• Length: 9 in
• Width: 6 in
• Height: 5 in
• Weight: 2 lbs

Fitment

Universal fit for V-Twin engines. Plumbs inline of the breather system on most Harley and Indian models.

Frequently Asked Questions

How often do I need to clean the separator?

Check the canister every 1,000–2,000 miles depending on riding conditions. Empty and rinse when oil accumulates.

Will this fit my specific Harley or Indian model?

This is a universal V-Twin separator. Verify your breather hose routing and connection points match before ordering.

Does this vent to atmosphere like other catch cans?

No — Moroso vents internally and collects oil in the canister. No atmospheric venting means cleaner air and no oil on your bike.

What's included in the box?

The two-piece air-oil separator canister and all necessary hoses and fittings to plumb into your breather system.