Oil pressure light on European Z400J four cyclinder.
- Warren3200gt
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 08:32 - 23 Sep 2022 08:39
Yep that screw just holds on the electrical connector. The actual oil pressure switch is threaded and unscrews.
www.z-power.co.uk/oil-pressure-switch650750
Change that poxy crimp connector for a proper soldered joint.
As I said I don't know your model but that pressure switch appears to be screwed into the sump which kinda makes the rubber boot important to protect the connection from all the road crap.
www.z-power.co.uk/oil-pressure-switch650750
Change that poxy crimp connector for a proper soldered joint.
As I said I don't know your model but that pressure switch appears to be screwed into the sump which kinda makes the rubber boot important to protect the connection from all the road crap.
Last edit: 23 Sep 2022 08:39 by Warren3200gt.
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- zedordead
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 08:44
Don't you think it's odd that the electrical pole connection is missing ? Also it's weeping oil slightly which doesn't seem right.
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- Warren3200gt
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 08:48 - 23 Sep 2022 08:59
No, 900 and 1000 have the pole type with the switch located under the cam chain tensioner. 650s have your type which on 650's is located behind the ignition plate on righthand side. On yours it's seems to use the 650 type but by the oil filter.
With the ignition on you should be able to touch that connector to the sump case to earth it out which will illuminate the idiot light. With disconnected the idiot light should be off. Doing this will test your wiring and idiot bulb. If it's the same result connected or not then you have a wiring issue also.
Where's it leaking from? The electrical connector thread or the switch to sump thread?
Remember the switch needs to be earthed to the engine for it to work so you can't just use ptfe tape on the thread.
With the ignition on you should be able to touch that connector to the sump case to earth it out which will illuminate the idiot light. With disconnected the idiot light should be off. Doing this will test your wiring and idiot bulb. If it's the same result connected or not then you have a wiring issue also.
Where's it leaking from? The electrical connector thread or the switch to sump thread?
Remember the switch needs to be earthed to the engine for it to work so you can't just use ptfe tape on the thread.
Last edit: 23 Sep 2022 08:59 by Warren3200gt.
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- zedordead
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 09:28 - 23 Sep 2022 09:42
Ok, disconnected the wire from the oil pressure switch and earthed it to the battery with a jump lead as I couldn't earth it to the sump and see the idiot light. Oil idiot light comes on when earthed with ignition on and goes out when not earthed. So wiring seems OK does this point to the switch then? Very slight oil weep from the hole that the screw goes into to hold the wire on.
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Last edit: 23 Sep 2022 09:42 by zedordead.
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- Warren3200gt
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 09:38 - 23 Sep 2022 09:46
If the wiring is OK it can only be the switch unless, God forbid, you have no oil pressure.
You'll need to drain the oil for either a new switch or check out the old one. You know your next job!
To check out the old one test you have continuity between the switch body and the screw with the plunger resting and open circuit with the plunger depressed. Check for smooth action whilst checking.
You'll need to drain the oil for either a new switch or check out the old one. You know your next job!
To check out the old one test you have continuity between the switch body and the screw with the plunger resting and open circuit with the plunger depressed. Check for smooth action whilst checking.
Last edit: 23 Sep 2022 09:46 by Warren3200gt.
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- zedordead
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 09:47
I'm pretty sure I have oil pressure as its leaking from the rockerbox cover. I had already looked on the Zedpower site and the switch is the thick end of thirty quid with delivery, which is a releif as I was worried it was going to be something cheap instead
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- Nerdy
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Re: Oil pressure light on European Z400J four cyclinder.
23 Sep 2022 17:55 - 23 Sep 2022 17:58Thoughts please Gentlemen.
The oil pressure switch discussion seems well in hand, so...
I'd like to draw the group's attention to the safety wire on the fastener on the left. Is that the only piece so equipped or are there others?
EDIT: now that my brain is working, I realized that fastener is your sump plug. (The copper washer helped.) Still, not everyone safety wires these things.
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Last edit: 23 Sep 2022 17:58 by Nerdy. Reason: Added pic
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- zedordead
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Re: Oil pressure light on European Z400J four cyclinder.
24 Sep 2022 03:54 - 24 Sep 2022 04:01Yes I did notice the wired sump plug after I had bought the bike but I'm not too concerned as it's not the sort of bike you would use for racing. I's the only bolt that has been wired. I just put it down to an enthusiastic DIY er who got bored on a rainy day but I don't suppose I'll ever know why.. If I can find a suitable recepticle for the oil I plan on taking the pressure switch out and having a root around inside it. It'll save me £30 if i can get it going again. Anyone have an exploded diagram?Thoughts please Gentlemen.
The oil pressure switch discussion seems well in hand, so...
I'd like to draw the group's attention to the safety wire on the fastener on the left. Is that the only piece so equipped or are there others?
EDIT: now that my brain is working, I realized that fastener is your sump plug. (The copper washer helped.) Still, not everyone safety wires these things.
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Last edit: 24 Sep 2022 04:01 by zedordead.
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Re: Oil pressure light on European Z400J four cyclinder.
24 Sep 2022 04:04 - 24 Sep 2022 04:05Thanks for posting. Is that your ebay listing? There are similar but not the same listings on UK ebay but one of the exact model is always good. I suppose the engines will be same despite the bodywork.
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Last edit: 24 Sep 2022 04:05 by zedordead.
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- TexasKZ
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Re: Oil pressure light on European Z400J four cyclinder.
24 Sep 2022 05:34 - 24 Sep 2022 05:42
The actual service manual likely has a different cover than the assembly and prep manual. I suspect the service manual covers far more topics, and yes, get one that covers your exact model and year.
I do not recall which model and year you have, but while you are trolling the internet for a service manual, you might take a peek at this one in case it covers yours.
www.kzrider.com/modules/ServiceManuals/Kz400500550_79to83.pdf
I do not recall which model and year you have, but while you are trolling the internet for a service manual, you might take a peek at this one in case it covers yours.
www.kzrider.com/modules/ServiceManuals/Kz400500550_79to83.pdf
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
Last edit: 24 Sep 2022 05:42 by TexasKZ.
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Re: Oil pressure light on European Z400J four cyclinder.
24 Sep 2022 05:35
P.S. I wonder why somebody went to the trouble of safety wiring that abused drain plug?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
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- zedordead
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Re: Oil pressure light on European Z400J four cyclinder.
24 Sep 2022 06:14 - 24 Sep 2022 07:42Registration docs say it's a 1983 registered four cyclinder which I dont think the US got. Worst case I can think of about the drain plug is the threads are stripped and it's wired to stop it falling out!The actual service manual likely has a different cover than the assembly and prep manual. I suspect the service manual covers far more topics, and yes, get one that covers your exact model and year.
I do not recall which model and year you have, but while you are trolling the internet for a service manual, you might take a peek at this one in case it covers yours.
www.kzrider.com/modules/ServiceManuals/Kz400500550_79to83.pdf
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Last edit: 24 Sep 2022 07:42 by zedordead.
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