Temperature stuck thermostat modified

Moderator: Moderators

Post Reply
Tez123
Posts: 10
Joined: Wed Jan 17, 2018 10:19 am

Temperature stuck thermostat modified

Post by Tez123 »

Hi my temperature gauge seems to be reading roughly 20 degrees constantly. My Zxr was converted to a race bike with ram air and the oil cooler radiator removed. I'm not too sure what they have done to the stat. I have tried to add a picture or two but it is saying file size too large, the picture is only just over 2mb, what is the easiest way for me to attach a photograph?

Thank You

Terence
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

I use Flickr, post my pics on there and then upload to here.

See if that works, if not I will send you my email and I will upload them for you
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
Tez123
Posts: 10
Joined: Wed Jan 17, 2018 10:19 am

Re: Temperature stuck thermostat modified

Post by Tez123 »

I've managed to find a website that can compress the file size so hopefully it has worked.
You do not have the required permissions to view the files attached to this post.
Tez123
Posts: 10
Joined: Wed Jan 17, 2018 10:19 am

Re: Temperature stuck thermostat modified

Post by Tez123 »

Here's the others if they help.

Thank You
You do not have the required permissions to view the files attached to this post.
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

OK so that's not a standard radiator for the bike, and that looks like a temperature probe, not a thermostat?
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

That 2 pin bit on your last photo is a fan switch, so that's what monitors the rad temp and turns on your fan if needed... Which you dont as its been removed.
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

The thermostat is located underneath the carbs
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
Ewetea
zxr400 oc member
zxr400 oc member
Posts: 148
Joined: Mon Jan 12, 2009 12:04 pm
My Bike: ZXR400L5
Location: Newport Shropshire

Re: Temperature stuck thermostat modified

Post by Ewetea »

That is fascinating! It looks like a temperature probe connected to the bottom right hand side of the radiator, but the amount of Araldite holding it in place is impressive. I assume that is a wire at the end of the assembly, so it would be interesting to know where it goes. I wouldn't be surprised if there was no thermostat fitted, hence the reason for a static reading of the temperature. I assume that there is no fan fitted on the basis that the bike will be started and warmed up just before a race, and then switched off at the conclusion. In between the air flow will cool the radiator. Please keep us informed!
Tez123
Posts: 10
Joined: Wed Jan 17, 2018 10:19 am

Re: Temperature stuck thermostat modified

Post by Tez123 »

Thanks guys that's interesting to find out it's a different radiator. I had a look under the carbs and I can see a screw in type sensor but it disappears into the loom. Yeh your right it is a wire that goes directly to the temperature gauge which also appears to be a different temperature gauge. This isn't really an issue to the bike running, only the fact that the gauge doesn't appear to be working so I can't monitor the radiator temperature. I've just contacted the manufacturer to see if there's anything that can be cleaned or if it needs a whole new unit. According to the website it is a mechanical gauge.
You do not have the required permissions to view the files attached to this post.
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

Is that a hollow tube then that's going from the rad to the temp gauge? Or is it an electrical wire?
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

I just checked yeah it's a capillary tube temperature gauge, definitely not standard and definitely worse than an electrical one.

I would say either a blockage of the capillary tube or a dead gauge. I have a zxr400 temperature gauge here that you can have for a tenner, it needs power, ground and a wire to that sensor on the left side of the engine that "dissappearus into the loom" that's under the carbs, that's your temperature probe.

If the gauge I have is not working then your issue is the bikes temperature probe, these are still available from kawasaki
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
Tez123
Posts: 10
Joined: Wed Jan 17, 2018 10:19 am

Re: Temperature stuck thermostat modified

Post by Tez123 »

Hey Banner sorry I didn't reply I didn't see your last post for some reason!? Do you still happen to have the original temperature gauge I could buy off you?

Thanks

Terence
User avatar
banner001
Track day God
Track day God
Posts: 2584
Joined: Sat Sep 24, 2011 3:27 pm
My Bike: ZXR400 L4
Location: Nuneaton

Re: Temperature stuck thermostat modified

Post by banner001 »

Hi there, let me go and check...
UK ZXR400 L3 (1993) - Fully restored and on the roads, my green beast!
JPN ZXR250 A2 (1990) - Revs to 19,200rpm... 'nuff said :smt003
Post Reply