PO modified the stock airbox. Keep it or replace it?
HDF Community Team
Joined: Nov 2012
Posts: 6,191
Likes: 2,423
From: USA
Those numbers keep coming up as proximity sensors, though none visually match that one.
You're going to have to chase the wires through the harness to see where they go, to better figure what this is. I don't see it as OEM on the parts diagrams, and know of no purpose for a proximity (or pressure or temperature) sensor there.
That does not look typical aftermarket. Better pictures around the sensor to see all the numbers would help. As well finding where the wiring goes too.
You're going to have to chase the wires through the harness to see where they go, to better figure what this is. I don't see it as OEM on the parts diagrams, and know of no purpose for a proximity (or pressure or temperature) sensor there.
That does not look typical aftermarket. Better pictures around the sensor to see all the numbers would help. As well finding where the wiring goes too.
This is the code on that sensor. Not much on google...
3NTO1F-D3742
Exactly what I wondered. There's one hole above and two below the stock ones
The 2 wires go into that connector on the right, and than into the main harness that goes to the front of the bike, under the tank
Last edited by Rico87; Dec 10, 2019 at 02:11 PM.
No cooling fan. This was a police bike if that matters, in Australia. Maybe there was some extra mounted on it, have no idea
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,568
Likes: 3,957
From: Vermont
Didn’t international models have both active intake and active exhaust? Could that be an active intake sensor?
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
Club Member
Joined: Sep 2010
Posts: 15,436
Likes: 7,130
From: Beyond Fucital
Theres no hole in either the back plate or sensor switch so its not vacuum or pressure operated. Definitely thermal. Like someone else said maybe there WAS a cooling fan and it was removed.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Possibly a 'parade fan'? Isn't your bike an Olympics special RK? Such a fan would make good sense - may be available as an optional extra. I realise that in Norway a heater would probably be more appropriate!