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Old 08-09-2011, 06:23 AM   #1
Bumpaman OP
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Radiator cap

Time to replace the radiator cap on my 950 and was wondering if anyone could tell me if you need a specific KTM radiator cap or will a small 3PSI radiator cap from the auto parts store work as well . Just want to be sure. Thanks for the help.
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Old 08-09-2011, 06:39 AM   #2
redbastard
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Ktm

I looked for an after market replacment for my rad cap with no luck. The factory pressure on the rad cap is 1.2 bar which I believe is aournd 18-19 psi, much higher than most. Just bite the bullit and get the factory cap.
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Old 08-09-2011, 06:52 AM   #3
Bumpaman OP
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re:

I understand. After looking in the parts book I see the cap is rated @ 20.3 psi. Thanks
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Old 08-09-2011, 07:21 AM   #4
mdfehrmann
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I use the cap off the smaller dirt bikes, they make one with the same pressure rating as the 950/990 and it's half the price.
1.4 bar or 20.3psi
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Old 08-09-2011, 08:23 AM   #5
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On the advice of others, I'm replacing my 1.4 and just ordered a 1.8 cap from BikeBandit...plus you get an AMA discount...
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Old 08-09-2011, 08:32 AM   #6
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The KTM 640 and 990 use the same 1.4 bar radiator cap, I paid $19 for the cap.
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Old 08-09-2011, 08:48 AM   #7
Rockwell
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Originally Posted by Shuffler View Post
On the advice of others, I'm replacing my 1.4 and just ordered a 1.8 cap from BikeBandit...plus you get an AMA discount...
Why was that advised?
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Old 08-09-2011, 08:55 AM   #8
Johnf3
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On the advice of others, I'm replacing my 1.4 and just ordered a 1.8 cap from BikeBandit...plus you get an AMA discount...
I wouldn't recommend a higher pressure cap. It's harder on your wp seal, which is already a suspect area for the LC 8. It's really not necessary anyway, if your cooling system is operating correctly.
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Old 08-11-2013, 07:32 PM   #9
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kick this one up again

So does any one run the 1.8 cap? My bike is dumping water after about five minutes in town.

Would the wisdom of theweb say this is a properly operating cooling system?

And I bled the eff out of it before this bullshit.

Stock cap bad or a cooling system that only works at twenty plus mph. I have the higher cap in front of me. The goal isn't to have a parking lot bike just not one that purges itself and effs. Me
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Old 08-12-2013, 05:51 PM   #10
Zuber
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Higher Pressure = higher temp before boil over

The stock cap on the dirt bikes is now 1.8 bar, some accessory caps go to 3.0 bar.

Don't think the higher pressure would significantly effect the water pump seal.
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Old 08-12-2013, 06:17 PM   #11
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Quote:
Originally Posted by Bumpaman View Post
I understand. After looking in the parts book I see the cap is rated @ 20.3 psi. Thanks
Be sure of the reach. The caps I have seen in places other than KTM shops, are the right diameter, and pressure rating, but have a shorter distance between the cap and pressure the seal. They will not seat, and would effectively leave you with a 0 psi cap.
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MortimerSickle screwed with this post 08-12-2013 at 06:29 PM
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Old 08-13-2013, 04:19 AM   #12
Themastermike
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Quote:
Originally Posted by Zuber View Post
Higher Pressure = higher temp before boil over

The stock cap on the dirt bikes is now 1.8 bar, some accessory caps go to 3.0 bar.

Don't think the higher pressure would significantly effect the water pump seal.
Good info. Thanks.
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Old 08-15-2013, 08:44 AM   #13
Killer Torque Monste
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Question Posting Photos

Hi Guys,

Some help please. A seriously dumb question maybe, but how do I add picture attachments of my KTM 1190 R to my reply's on this thread?

Thx,

Louis
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Old 08-15-2013, 10:49 AM   #14
MortimerSickle
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Hi Guys,

Some help please. A seriously dumb question maybe, but how do I add picture attachments of my KTM 1190 R to my reply's on this thread?

Thx,

Louis
http://www.advrider.com/forums/showthread.php?t=919
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