If I could have found an XS850 oil cooler, either OEM or aftermarket I would have bought it. But you have to get all the parts, including squish plate and threaded adapter socket. XS1100 and XJ650 are the correct size but have the outlets exiting out the side rather than front and foul the engine mounts. After 2 years of searching without luck, I finally gave up and bought a Ebay Chinese 7 row AN8 Universal oil cooler kit. I knew at the time that the sandwich plate in the kit would not fit, so that's why I am making a new plate. Now if you have a spare XS850 plate & socket in the shed, let me know, as they are a more elegant solution!!!
Confirmed a few more measurements today and I have been able to reduce the thickness from 32mm to 28mm. How thick are the genuine plates?
Photos are of all the features that need to be considered when making the plate.
Cheers
Tim