The Screamin’ Ea­gle Way

Hot Bike - - Contents - WORDS AND PHO­TOS: MARK MASKER

The Mil­wau­kee-eight mo­tor is still in its in­fancy, but, like any good par­ent, its own­ers want the best for their baby and will pay money to get it. Much like an ac­tual baby, op­ti­mal breath­ing is pretty im­por­tant when it comes to motors. The dif­fer­ence be­ing you can’t shove one of those rub­ber nose plungers into your mo­tor to make it breathe bet­ter.

What you can do is go out and get your­self a per­for­mance air cleaner, like the Screamin’ Ea­gle Heavy Breather we got our lit­tle mitts on for our 2017 Street Glide. It’s a quick-and-dirty in­stal­la­tion that up­grades our oxy­gen in­take, giv­ing the Mil­wau­kee-eight more air to burn. We didn’t see a rea­son to have it look ugly, so while we were at it, we dressed up the new breather with the match­ing Screamin’ Ea­gle Bil­let Heavy Breather Trim.

The new Screamin’ Ea­gle Heavy Breather sex­i­fied the Mil­wau­keeeight in our H-D Street Glide.


After re­mov­ing the back­ing from the in­duc­tion mo­d­ule back­plate gas­ket and in­stalling it to the plate, Alan puts the rub­ber rings in place in the coun­ter­bore around the breather screw holes.


The Screamin’ Ea­gle Mil­wau­kee-eight Heavy Breather (part #29400264) comes com­plete with ev­ery­thing but the tools and the Loc­tite.


By the time we got to the Har­ley-david­son fleet cen­ter, shop boss Alan Barsi al­ready had the stock breather assem­bly re­moved from the Street Glide.


Here, Alan screws the back­ing plate assem­bly onto the mo­tor. A dab of blue Loc­tite goes onto each back­plate mount­ing screw, they’re in­serted through the plate to the mo­d­ule, and he twists each screw just enough to en­gage the threads of each of them.


The Screamin’ Ea­gle Bil­let Heavy Breather Trim Kit (part #61300688) is pretty simple: air­box cover, foam pad, air­box col­lar, and four #8-32 x 1.25-inch screws.


His first step is to join the kit’s throt­tle body to its back­plate with the in­cluded self-tapping screws. He uses blue Loc­tite on all of the threaded fas­ten­ers for this project.

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