That's a Nice little CB350K4 Warwick,I have the exact same bike.
I give you permission to "pick my brain"(if you can find it
) w/ any questions about the repair end of it.I recently moved and I do have many spare parts back in storage when I decide to go get them...
I highly recommend that you upgrade the cam chain tensioner rollers from the original 40 year old rubber to the better quality parts that are available for a great deal on Ebay.I just purchased a set from the man in Poland,he's an excellent professional machinist & he loves the little CB350 twins.
The original rubber rollers will be chipping & fraying lot's of chunks of rubber and that can work it's way all through your oil passage ways & also clog the oil pump screen along w/ many passages.
Enjoy !