Welcome Kevin, thanks for the introduction with pictures. Good to see another DOHC 450 avoid the crusher and stay on the road. If only you'd found this forum sooner, some of your engine woes may have been avoidable. The 450 engine is unique among vintage Hondas and there are things every owner should know about it to ensure longevity. Though you may well be aware of it now, here is one thing I like to share with every new member who owns a 450, along with some other info you might find helpful as well.
www.hondatwins.net
www.hondatwins.net
Important information for all DOHC 450/500T owners
Many here, including myself, have often talked about the safe approach to warm-up on a 450 or 500T with respect to oil flow to the top end. The design of the cylinder head does not allow for any residual oil to remain under the cams and followers to keep them properly lubricated until oil flow...

Helpful tips to identify and locate parts for your...
Many join here who have never been involved in the world of vintage Hondas and are unfamiliar with how to find parts and some of the better places to look for them. The question comes up often: "Where can I find a (insert part name here)?" The first and best step to finding any part for our...