AIR BOX TEMP. SENSOR

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My dad discovered this and made a fix.

There is an AIR TEMPERATURE SENSOR in the air box that could be a problem that most don't even know about. The problem is when ever you wash your bike or it rains, this area where the sensor is mounted fills with water.

So now it will either corrode or short out.

THE FIX

- Remove your rear wheel, hugger and airbox.
- Fill any void with dielectric grease
- make a drain (if this is within your skill set)
- replace air box with care as not to fold over the rubber boot which will happen very easily)


Since my dad has done this, all the idle issues have gone away. Bike starts perfect and idles off the button in cold and in warm temp.

Good luck, hope this helps.

Striped Norton 961 SE #107 by ONE-07, on Flickr
 
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Hello Richard-7 , Can you show the air box and the air temp sensor location ? Top , bottom , front , Back ? Thanks , Tony
 
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Unfort. you cannot see it without removing the airbox and you cannot remove the airbox without removing the rear wheel. The pics my dad took aren't really worth posting.
 
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If you remove the AIR filter and put your hand in along the inside top and towards the forks you will feel it. The problem is, it's mounted in a dip that collects water. There is no where for the water to go! Except if wind pushes it away. But in a storm or after washing it shorts out. Second best thing to do is take is apart and cover the outside in dielectric grease to prevent this. Best thing to do is what my dad did, make a drain.
 
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Thanks , I suppose I could use compressed air and spray a bit of water displacing lubricant in there for now. The air should reach there and force the collected water out the spray will help stop corrosion. Do this after every rain and wash . This is the easiest way for right now , I will let everyone know how it goes. Thanks again. Tony
 
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My dad was saying you can remove a few bolts and lower the airbox a little bit, prolly enough to get dielectric grease in with a brush. At least get you through until you can remove the rear wheel and hugger.

Please take pics if you do this. I'll be removing my airbox once my dad gets back from his WEST trip so I'll be sure to take some good photos and post them up.

Heavy rain and after a good wash has been the only issue he's ever had with the bike not running well and thought the spark plug drains weren't good enough in the cooling fins, but..... for now, it seems this sensor was the issue.
 

Gordon28

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Richard,

I'm going through the transmission vent install and the manual would seem to indicate you simply need to lower the air box and you can remove the sensor plug. Were you able to do so, or is removing the wheel and hugger the only option? I can't figure out how to remove the sensor plug with it simply lowered. Any tips? I'm not quite prepared to remove the wheel.

By the way, I just finished the ignition coil and plug wire upgrade. That was really simple. Thanks.
 
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I've done it on a few bikes without removing the rear wheel. But you cannot get the airbox out only lower it enough to get in there. It's tight -- that's for sure. But can def. be done. The removal is required if you decide to drill a hole up top to drain the water like my dad did. I decided not to drill mine and rather stuff rags in the sides under the seat when spraying with the hose and then using an air compressor to blow out the water.
 

ntst8

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Hi Richard - resurrecting this to ask the silly question - i guess something like a 2mm hole would do the trick?
 
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That would work.
Hi there,
Going over my 961 Sport and checking forum noted problem areas and so far so good, looks like they're covered on the newer bikes, bought mine Dec. 19. Can't locate an airbox temp sensor but see something in the vicinity, rear of the injectors, that looks like it could be it. Tried investigating via the airbox from the filer mount but with all the additional cabling and tubing the air filter is no longer removable.
 
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Hi there,
Going over my 961 Sport and checking forum noted problem areas and so far so good, looks like they're covered on the newer bikes, bought mine Dec. 19. Can't locate an airbox temp sensor but see something in the vicinity, rear of the injectors, that looks like it could be it. Tried investigating via the airbox from the filer mount but with all the additional cabling and tubing the air filter is no longer removable.
Top side of the airbox. Remove filter, reach in along the top side towards the fuel tank. Or use the camera on your phone to see it.
 
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Anyone know a source for a replacement air temp sensor. Seems like it's the only one I have not seen on the forum. I'm in the car parts business and have struck out finding an exact match. Seems like the oil could take a toll after a few years.
 
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Anyone know a source for a replacement air temp sensor. Seems like it's the only one I have not seen on the forum. I'm in the car parts business and have struck out finding an exact match. Seems like the oil could take a toll after a few years.
 
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Email SCS Delta , they will know where you can find a compatible sensor I would think.
 
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Honeywell? Damn. Talk about inconsistent sourcing. Fortunately for me, oil in the airbox is the one issue I never had.
 
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https://www.digikey.be/product-deta...lutions/ES110-0016/480-ES110-0016-ND/10453720

View attachment 15144 I am not sure but just did a search and found this. I thought it said it has 70 in stock but all the others I checked said it was obsolete. Just checked and 70 is the minimum order Honeywell be able to provide their replacement as presumably they must make one. Good Luck
Have you ever had a problem with that part, Tony or are you stocking up for the long haul??
 

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