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baldy110

Oil cooler

7 posts in this topic

Hi, I just joined and I have a question.

I have a 1981 XR500R and I would like to install an oil cooler.

I have one from a XR250R. Does anyone know where to tap into the oil supply from the engine and where to tap into the return line. Thanks

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I tried the search forum and came up with nothing. The link you sent me to was for the XR600 not the XR500, big difference.

My questions still stand anyone.

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Hi, I just joined and I have a question.

I have a 1981 XR500R and I would like to install an oil cooler.

I have one from a XR250R. Does anyone know where to tap into the oil supply from the engine and where to tap into the return line. Thanks

I hate to tell you that I think you are out of luck. Most of the 1983 and on RFVC XR's and XL's use the front frame tube as an oil reservior and cooler. It is easy to add a cooler to the XR600 by putting it in series with the oil hoses that go to the frame reservoir. That is how the cooler that you have from the 250 was setup. I had an 81 XR500R and it does not have this external oil reservior. All the oil is inside the engine. The only oil that travels outside is the tube that runs to the head. I suppose that an oil cooler could be grafted into this line, but I'm not sure it is a good idea. The extra length could delay oil supply to the head at startup. That could be worse than the heat.

I understand why you want to add the cooler. My 500 ran very hot. In extreme conditions it would start boiling the gas in the carb.

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I know it can be done. I know people still race the FT500 Ascot and I have seen oil coolers on these. It uses the same engine as the XR500. I was hoping one of them might read this and help out. Thanks anyway

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I know it can be done. I know people still race the FT500 Ascot and I have seen oil coolers on these. It uses the same engine as the XR500. I was hoping one of them might read this and help out. Thanks anyway

A quick search of "ascot oil cooler" on Google turned up this guy as the man to ask about the mods necessary for an oil cooler. http://www.barebones.net/

On the FT500 engine a mod is done to the right side cover to add some fittings.

I'd say give the guy a call and see if he can set up up. The best stuff was on another board at http://forums.13x.com/showthread.php?t=126932

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