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Discussion Starter · #1 ·
Ok - I need another piece of advice. I have what is purported to be a CB450 hardtail frame which I want to turn into something to look cool and tool around town. I have a 1976 CB360 which I was originally going to turn into a hard tail but subsequently found this frame. The CB360 is clean and unmolested but parked for the last 13 years. I have started cleaning out the carbs (very dirty) and such. It seems very clean. I also picked up a 1968 CB450 K1, which was sort of chopped purported in the 1970's, which I believe. They put these extended forks on it, without figuring out the problems with rake and trail. They didn't chop the frame, which made an amazingly tippy and fairly unridable bike. So I believe this bike hasn't been ridden much for many decades. It is also not particularly clean and it leaks oil from some place I have yet to sort out.

Now the purported 450 frame appears to have the right front mounts and top mounts although the bottom mounts may or may not be correct. So even though it has CB450 numbers, it may or may not be for a CB450.

So, to the forum, which motor would you try to revive? The cleaner, newer CB360 which may take some work to fit in the frame but looks clean and tight or the older, leaky CB450 which has a higher possibility of fitting in the frame but probably more issues in the actual motor?
 

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Prairie said:
So, to the forum, which motor would you try to revive? The cleaner, newer CB360 which may take some work to fit in the frame but looks clean and tight or the older, leaky CB450 which has a higher possibility of fitting in the frame but probably more issues in the actual motor?
I'd go for the 450 - not just because it's my favorite bike, either.
Read through recent posts from 360 guys here - a lot of 360 parts are getting almost impossible to find, especially cam chain tensioners/guides, stuff like that - not to mention the dreaded carb diaphragms.
The 360 also has a couple of major design flaws. not the least of which is having no replaceable cam bearings - burn up the cam, you get to buy a new head somewhere, if you can find one.

So, in the context of getting the motor going and keeping it going, the 450 would win hands down, in my opinion.
 

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scrap the hardtail and send the leftover 450 parts to me :mrgreen:
 

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Whilst I would never contradict anything Bill sez, I'll add that you can actually get most CB360 parts online at cmsnl.com and lots more on ebay. Good luck either way you choose...you're in safe hands on this site :cool:

Lee
 

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Discussion Starter · #7 ·
The Frame - The neck has a CB450 VIN but the weird welding on the back mounts makes me wonder if it were adapted to something else. Most likely a Honda but what, I have no idea...
 

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Discussion Starter · #8 ·
The CB450 K1 - 1968 - leaks oil, dirty, sat outside for a while. Unknown if it runs. Clearly hacked sometime in the past as evidenced by the mess on the back end where someone chopped the fender and unplugged the lights but didn't do anything else. Purchase cost $200.
 

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Discussion Starter · #9 ·
The CB360 - kept in a garage for 13 years after the owner died. Clean, does not leak oil, not ever hacked. Also unknown if it runs.
 

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Discussion Starter · #10 ·
What I believe to be the K1 front end with extended (not stock) front forks. Removed from the 450 frame to figure out if they can be chopped down. Clearly way over stock length, clearly the people who put them on knew nothing about rake and trail, making the bike almost unridable as it wanted to tip over at slow speeds as they did not redo the neck. But they did many stupid things in the 1970's...
 

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Prairie said:
The Frame - The neck has a CB450 VIN but the weird welding on the back mounts makes me wonder if it were adapted to something else. Most likely a Honda but what, I have no idea...
Appears to be the front part of a 450 frame, cut and welded on to a custom hard tail arrangement.
The gussets where the coils normally mount have been added.

You might be able to EBay it and attract the interest of a chopper or bobber dude, especially if it's titled.
 

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Discussion Starter · #12 ·
I'm going to be the dude - somehow I'm going to make one running, ridable bike out of all of these pieces. It is going to be an adventure....
 
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