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Old 07-25-2014, 08:54 AM   #1
Harty OP
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Oil leak from oil switch

Hi guys

Just bought my first airhead(1978 R100RS) and quite a shock after my KTM 690 Enduro!!



Anyway I have a leak from the oil pressure switch, I've tried to tweak it up but no joy. The oil only leaks when the bike is mainly on tickover. Is this repairable or a new switch? I can't even exactly see where the leak is from, but it appears to come from the inner plastic??



Cheers for any help.
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Old 07-25-2014, 09:38 AM   #2
Bill Harris
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Leaky oil pressure switch. Replace it.
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Old 07-25-2014, 09:47 AM   #3
Rob Farmer
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Double posting on UKGser and here Harty?
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Old 07-25-2014, 10:14 AM   #4
Cordless
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Just to make sure it's the oil pressure switch, clean the switch and the area around it as much as you can. Spritz a good blast of talcum powder over the area. Ride for a few miles. Check to ensure it's the switch producing the oil and not some other source.

Renew the switch.

BTW, isn't that RS missing a few RS bits?
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Old 07-25-2014, 11:39 AM   #5
Plaka
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Quote:
Originally Posted by Harty View Post
Hi guys

Just bought my first airhead(1978 R100RS) and quite a shock after my KTM 690 Enduro!!



Anyway I have a leak from the oil pressure switch, I've tried to tweak it up but no joy. The oil only leaks when the bike is mainly on tickover. Is this repairable or a new switch? I can't even exactly see where the leak is from, but it appears to come from the inner plastic??



Cheers for any help.
You paid money for that?()

The KTM was the real deal. (although I hear they are a pain to maintain)

Replace the leaky switch. They are inexpensive and there are a couple interchanges
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Old 07-25-2014, 03:26 PM   #6
Skyshadow
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What is that screw under the switch...I think mine is leaking oil from there.
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Old 07-25-2014, 05:39 PM   #7
Bill Harris
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That is a screw plug for one of the oil gallery drillings. Its' the main oil passage from the pump to the oil filter.

Your leaky screw plug is the cross-wise one under the oil pressure switch The other one is at the rear of the drilling that goes forward to the oil filter and is located under the clutch bellhousing.

Easy to fix-- use a high-temp thread sealant (a Loctite product).
Hard to get at, at least this crosswise one. Need to pull an engine cross-bolt and lower the engine to get clearance around the frame member. Been a while, I disremember front or rear bolt and the gotcha you'll run into with the driveshaft.

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Old 07-26-2014, 03:34 AM   #8
Skyshadow
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I wonder how many folks mistake the oil sender leaking for this screw?
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Old 07-27-2014, 10:03 PM   #9
Bill Harris
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Probably.
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