Hi folks. I recently picked up a D675 track day bike, that the previous owner suspected it had blown a head gasket as the oil and coolant had mixed and blew out the coolant overflow oiling a track On a rainy track day. I picked it up for a project after reading that there was a possibility that it was the oil cooler here, and knowing that there was an engine for sale currently not far from me if it was worse. So far I’ve diagnosed that it’s a failed cooler, I’ve blown it out, capped the coolant in and out on it as well as capped off the coolant lines and remounted it so I could begin flushing out the coolant, and oil. ‘So far I’ve turned it over, and then got it running. It’s not smoking, and doesn’t sound bad I’m on the 3rd round of flushing coolant and oil, and it’s starting to look pretty good. I’ve got the UKRS oil cooler and Samco hoses on the way!