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Old 06-30-2011, 06:56 AM   #946
Lorretto
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I pulled the top hose off the radiator it was still pressurized and spitting some coolant. I figure the system was full and holding pressure. I started the bike with the top hose off and promtly pumped 1/2 L of coolant onto the front tire. Looking at my front tire soaked in anti-freeze, I figure I'm a dope and there was a better way to check if the water pump was actually pumping.

Maybe I'm overthinking this but it bugs me the fans are running non-stop. The bike is not puking coolant when I stop and as far as I can tell is not running hot. I think it's down to a bad temp sensor switch or the radiator is stuffed up. Is there anything else I need to check? Anyone got a spare temp sending unit your willing to part with? Maybe the simple answer is to get a temp guage and put a manual switch on the fans.

Any thoughts on what's next would be appreciated.
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Old 06-30-2011, 10:32 AM   #947
benzok
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Bluhduh

Lorretto,
my ol' 99 has a temp sensor from Magneti Marelli and has the following characteristics

Temp Resistance
10 6k
20 3.75k
25 3k

When you remove the connector verify that there is no water there.

But it the engine starts and runs normally, I doubt that it is the sensor

I think this is the sensor used: http://motorsport.magnetimarelli.com...S05_rev5.0.pdf

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benzok screwed with this post 06-30-2011 at 11:04 AM Reason: Added link
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Old 06-30-2011, 12:35 PM   #948
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Thanks Benzok - it looks like I should be able to source a new sensor if that's the issue.

I may try a full cooling system flush and see if that does anything.

The sensor does seem to work in cutting off the fans when I park the bike using the kill switch with the ignition on.
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Old 07-01-2011, 12:03 PM   #949
benzok
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Lorretto,
I just realised that there is a separate sensor for the fans. The one I mentioned is used by the ECU and is located on the rhs of the front cylinder , the fan sensor is located in the radiator

Sorry for the confusion
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Old 07-01-2011, 02:23 PM   #950
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No worries, I appreciate the help.

With no idiot light I just get nervous the engine will grenade out from under me. With both fans running non-stop I just assumed it's running hot but it just doesn't seem so.

I saw the temp sensor just below the fan under the right fairing looks like a common part.

What does that second sensor do? If that is some sort of secondary safety, it would make me feel better.
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Old 07-02-2011, 03:32 AM   #951
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The thing in the radiator is a thermo switch, should be possible to find a new one.
I can't help you with the switching temperature. If you want I can give Rollox a call next week.

You can measure the switch , should be n.c. up to ~ 87 ? (Thats' when the fans kick in on my Triumph)
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benzok screwed with this post 07-04-2011 at 04:51 AM
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Old 07-04-2011, 04:55 AM   #952
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Just spoke with Rollox
late 90's KTM's uses the same radiator/thermo switch

He also mentioned that there had been some problem with the cables, if you disconnect the cable and the fan stops it is probably the switch, if it keeps running I would guess there is a problem with the cabling
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Old 07-04-2011, 08:22 AM   #953
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Benzok - Many thanks amigo.

I'll pull the wires and see what happens.

I was thinking of putting something in line like this http://www.jagsthatrun.com/Pages/Parts_Cooling_SightGlass.html for the guage sending unit if I can find a size small enough. It won't solve the fan problem but it will go a long way in letting me trust that the bike is not running hot.
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Old 08-05-2011, 01:43 PM   #954
Oldobi
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Question Caburetor

Hello

I am looking for jet adjustments. Has somebody a caburator Modell?
If yes it would be helpfull to now all jet sizes.

Olli
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Old 08-06-2011, 09:58 AM   #955
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Sorry Olli, EFI on my bike. Hopefully someone with a carbed bike will be able to chime in.

Just out of curiosity is one or two carbs, Keihin, Mikuni, CV?

One piece of info to add for the Highland collective - the Thermoswitch for the cooling fans is an exact match with a 1984 BMW 318i the only difference that I can find is it puts the opperating temp range up a bit to 90-95 vs 85-90. No re-wiring needed, clips match.
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Old 08-06-2011, 12:50 PM   #956
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Carburator Mikuni HS 40

Hello Lorretto

Its 1 Mikuni HS 40. Normaly used on Harley Davidson. Its running good but gas consume is to high.
16 liter / 100 km or 15 miles / gallon.

Olli

Quote:
Originally Posted by Lorretto View Post
Sorry Olli, EFI on my bike. Hopefully someone with a carbed bike will be able to chime in.

Just out of curiosity is one or two carbs, Keihin, Mikuni, CV?

One piece of info to add for the Highland collective - the Thermoswitch for the cooling fans is an exact match with a 1984 BMW 318i the only difference that I can find is it puts the opperating temp range up a bit to 90-95 vs 85-90. No re-wiring needed, clips match.
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Old 08-07-2011, 02:49 PM   #957
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Olli:

That is bad on the consumption side bump.

I'm no mechanic and stumble my way through any issues with the Highland so I'm probably no help whatsoever. My thinking is if the bike running well at all rpms and loads there is probably more than just the jetting on the rich side casuing the poor mpg. Did you try checking for vacuum leaks around the carb boot and intake? On a CV carbed bike, I found a really tiny crack in the carb boot by spraying starting fluid at it. Course I was the idiot that put the crack in the boot in the first place fighting with it trying to get the carb seated.
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Old 08-08-2011, 09:56 AM   #958
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No leaks

Hi

I am sure that there no leaks. I build up new the bike since 2 years. I hope that I can find somebody here with a carburator modell to get some expirience.
But thanks for your tips.

Olli
Quote:
Originally Posted by Lorretto View Post
Olli:

That is bad on the consumption side bump.

I'm no mechanic and stumble my way through any issues with the Highland so I'm probably no help whatsoever. My thinking is if the bike running well at all rpms and loads there is probably more than just the jetting on the rich side casuing the poor mpg. Did you try checking for vacuum leaks around the carb boot and intake? On a CV carbed bike, I found a really tiny crack in the carb boot by spraying starting fluid at it. Course I was the idiot that put the crack in the boot in the first place fighting with it trying to get the carb seated.
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Old 08-09-2011, 06:01 AM   #959
nsx
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Need lower triple clamp

The lower triple clamp on my Motard is twisted and supposedly not repairable, so I'm badly in need of a replacement. The guy repairing the bike says the part # on part is 590.01.031.120. Can anyone help? John?

Thanks,

Robert
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Old 08-09-2011, 05:40 PM   #960
Lorretto
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Try thishttp://cgi.ebay.com/ebaymotors/KTM-SX-EXC-models-Botom-Fork-Clamp-NEW-Triple-Tree-/160578325012
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