I acquired a batch of parts from craigslist posting. This tank appears to me to be a CB450 tank but I do not know that to be the absolute truth. It is a bit different than my original 72 CB450 tank but not by much.
66Sprint said:The bottom chrome strip says 72, 73, or 74....The push button on the cap says pre 74....So we've narrowed it down to a 72 or 73 model CB450.....
66Sprint said:Some 71's (K4's) were sold and titled in 72....IF you have a K5, (serial starting CB450-5000001), it should hve the strip........ Many "earlier tank caps were retro-fitted with the "key' type cap opener....It was a 'recall".......
Check here: http://www.motorera.com/honda/h0450/sport/sport.htm
Mine is as it rolled off the showroom floor. Still had the original tires and the motor break in was not even complete. Not sure how someone can store a motor vehicle for decades without ever using it but they seem to turn up fairly often.JamesPal said:Check the VIN to find out what model it is. It is really hard to say what has happened to out bikes in the 40 years they have been around. I was surprised to see my K5 has a K7 engine in it.