Bottom end failure - 2018 EC300

[riton63]

Hello my 300 ec 2018 had the same problem at 27h. Ignition side bearing broken. Then at 6500km the 2 rusty crankshaft bearings and now at 12000km too. I had changed the cylinder head in the meantime so for me the cause is cylinder or hot porous casings. It must be very low because I have never added coolant. I've been riding motorcycles for 40 years and this is the first time it's happened to me. In fact, this only happens on the 300. I use NTN steel cage bearings. I will try to put a lower radiator cap 1.4bar. I'll keep you informed. French rider.