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Author Topic: 1977 CB750 header on a 1973 CB750k3  (Read 872 times)

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Offline ghostdevil273

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1977 CB750 header on a 1973 CB750k3
« on: July 27, 2021, 08:07:18 PM »
Hello guys and gals...
New here think this my 1st post....?
My tech question is looking at the 1977 and up headers. With theses I notice that there is no "exhaust" fin clamps I purchased a bike 5 years ago with all the boxes I got with it,,there is none lol...
Looking buy some but price just unreal. I was looking at going with later header which just has flanges.
I assume this can be done
Yes I did do a search on here did the keywords came up with nothing.
I'm Harley guy.....lol
I was just thinking out the box save little cash
.............input please
Thank u in advance
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1973 CB750k3 Cafe Racer(REbORN is it name)
1973 HD XLCH1000 Sporty kickonly (MayBelle)

Offline ghostdevil273

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Re: 1977 CB750 header on a 1973 CB750k3
« Reply #1 on: July 27, 2021, 08:16:14 PM »
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1973 CB750k3 Cafe Racer(REbORN is it name)
1973 HD XLCH1000 Sporty kickonly (MayBelle)

Offline newday777

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Re: 1977 CB750 header on a 1973 CB750k3
« Reply #2 on: July 28, 2021, 03:16:47 AM »
Welcome aboard ghostdevil273
Good that you found your answer.
Introduce yourself and your bike in the new members section.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline bryanj

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Re: 1977 CB750 header on a 1973 CB750k3
« Reply #3 on: July 28, 2021, 06:01:51 AM »
Both sorts have finned clamps but they work different , early clamp arround the pipe holding the pipe to a spigot held into head with 2 screws. Later pulls into head on 2 studs where screws go and  uses 2 split collets between finned bit and flange on end of pipe
I am told that as long as you have ALL the hardware both can be fitted to any head BUT the back end may not match up to mounting points
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline ekpent

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Re: 1977 CB750 header on a 1973 CB750k3
« Reply #4 on: July 28, 2021, 08:48:04 AM »
 Some aftermarket headers use their own split collars and stockers won't fit so beware if buying used and it has none.
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