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Temperatures

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Well, it ain't gonna get much hotter than this. My calibrated lab thermometer in my carport says 97/98. I have an '07 XR650L, Dynojet kit, stock gearing, Uni filter, air box opened up. Running Castrol 4T full synthetic. Infrared thermometer.

After running at 65-70, and everything else below that, including sitting on the rather warm asphalt idling in traffic a bit, the highest oil temperature I see anywhere in the oil system is 248 degrees F. On the engine, between the fins rather high up, the highest reading I got was 312 degrees F. After all the stories about high temps, I feel a bit more than somewhat relieved.

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I feel like that's not bad at all given the ambient temps but still higher than I'd like to see. I wanted to make sure my bike didn't overheat so I installed an oil cooler. Now when I sit in traffic the highest I have seen is about 220 with it normally being around 185 or so when moving. Do you have an oil temp probe or how are you measuring?

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With an infrared thermometer gun (not the $19.95 Harbor Freight Special either). Have checked it numerous times at work and you don't lose more than 2 degrees across a thick cast iron interface compared to a calibrated digital probe in the oil bath, so I figure thin steel tubing should be even closer. Ditto with aluminum.

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