Have you considered using a rotary shaft seal instead of an o-ring? It seems like a shaft seal might be both lower friction and less likely to wear out.
Yes i do but two o-rings on both sides with a lot of grease and a mini fender on the underside of the swing arm do the same job.
The needle bearing has a very special OD of 27 mm, BKM2024JAU (KOYO), and i had to do some extra bore diameter of 28 mm
but i think about it to do it later, thanks for the tip.
I also wanted to say that this is the cleanest mono-shock conversion I've ever seen. Your clever and elegant use of the existing frame brackets is fantastic.
Thank you very much for your kind of words, it makes me a little proud.
I love the bolt on way and if i went back to twin shock the mono shock frame can stay there to strengthen the frame area.
The technical testing center inspector in Germany hate frame weldings and deny the inspection sticker without an welding report,(money pit).
A 1000J head need a "J" model valve cover. (plus cam chain idler adapter mod for the earlier KZ900/1000)
The head (ported) has new valve guides/seals but i need a 1100 ccm lower end for better Performance.