Oil cooler kits are made in the USA and available for the Honda XR650L, XR600, XL600R, XL600RM, and NX650 / Dominator.
Kind words from a customer:
"Just took her out for about a 3 hr hwy drive. Was running 70-75 mph the entire trip. Ambient temp was 90°F. It held a constant 225°F degrees almost the entire trip with one or two spikes at about 240°F pulling hills & headwinds, but the cooler was able to pull temps back to 225°F. It's definitely working. No more of those scary 275°F degree peaks anymore. You have a winner in this product."
This Kit Is For Closed Course Competition Use Only. Not Intended for Street Use. This kit requires the relocation of the stock smog pump located on the left side of the engine. I do not supply the parts to relocate the stock smog pump. You should always check your state's laws with regard to the use of aftermarket parts.