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Old 07-05-2014, 10:25 AM   #1
Smokeum OP
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06 ktm 950-Radiator Cap 1.4 or 1.8?

Any one out there using the 1.8 radiator cap instead of the 1.4 recommended by KTM? There are differing opinions.
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Old 07-06-2014, 01:29 PM   #2
gearheadE30
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are you having an issue with the stock one? I run the stock one and have not had an issue even riding hard in 100+ degree weather.
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Old 07-07-2014, 10:43 AM   #3
fredN4
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Quote:
Originally Posted by Smokeum View Post
Any one out there using the 1.8 radiator cap instead of the 1.4 recommended by KTM? There are differing opinions.
higher pressure radiator caps are a good idea if you ride at high altitudes in hot conditions.
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Old 07-08-2014, 01:50 AM   #4
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Just wondering, how high do you have to go to make a difference?

While I was on holiday recently, I rode the Grossglockner Hochalpenstrasse in Austria, summit about 3800m, and I'm wondering if it was a coincidence that my bike started leaking coolant from a radiator hose joint.
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Old 07-08-2014, 10:44 AM   #5
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If it' leaking from the hose joint, it's a coincidence. Altitude doesn't increase the internal pressure; it reduces the ambient pressure, resulting in somewhat less force required to blow the cap. If the seals are already worn, it doesn't take much. There is a reason most people say it's a good idea to replace the cap every few years when you do the coolant (generally recommend 2 years, as coolant does start tio get acidic and cause corrosion over time).

It took 11000 feet and a steep climb up a mountain pass for me to blow my stock rad cap that was admittedly very old. New cap fixed me right up.
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