I finally received the engine today! Started test-fitting it in a spare DTR frame, and there is a issue with the starter 'features' hitting the frame under the flywheel. I also started replacing the stator, as I'm going to run it with Zeel, so needs a charging coil as mentioned before.
This will take some time, plan is to measure up the engine completely and get it into EngMod2T simulation software first. So, I need to lift the top end, and probably I will do some cleaning of the ports and modify the head, as they seem to be very low compression from factory. I will need to sim the engine to get an idea of what way to go with the exhaust, modify an Athena exhaust, modify a gasgas 250 exhaust I have, or something else.. That way I can enter the exhaust dimensions and simulate them before cutting and welding etc.