Author Topic: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?  (Read 2916 times)

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Offline Oddjob

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #50 on: November 30, 2024, 06:05:48 AM »
How odd, that's the colour of my crankcases. The colour you want if you want the chrome look is called CermaKrome

https://techlinecoatings.com/cermakrome/

Offline MauiK3

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #51 on: November 30, 2024, 06:50:45 AM »
Sounds simple, worth a test try
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline jonda500

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #52 on: November 30, 2024, 04:14:34 PM »
I checked the part numbers:
500&550F both have 18231-323-000
550K has 18231-333-010 (edited- corrected from 323 to 333)
400 has 18231-333-010
One of the second hand pairs I purchased from ebay were from a 400 four, they were the shorter fin type - I still have no idea which type came earlier?
John
btw Fantastic detailing work Oddjob, I know what a long time that would have taken! Thanks for sharing that.
« Last Edit: December 01, 2024, 04:51:02 PM by jonda500 »
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...

Offline Oddjob

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #53 on: November 30, 2024, 05:12:52 PM »
The 550f, has a 333 middle part number, or has in the UK. Which means you were correct as that’s a 400-4 part. The CMS pic shows the narrow rear wall.

Online newday777

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #54 on: November 30, 2024, 05:23:58 PM »
The 550f, has a 333 middle part number, or has in the UK. Which means you were correct as that’s a 400-4 part. The CMS pic shows the narrow rear wall.
The 333 was the 350four
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, 2 K4, 2 K6, 1 K8
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

Online newday777

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #55 on: November 30, 2024, 06:13:24 PM »
The 550f, has a 333 middle part number, or has in the UK. Which means you were correct as that’s a 400-4 part. The CMS pic shows the narrow rear wall.

550F Supersport is 390
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, 2 K4, 2 K6, 1 K8
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 Oddjob

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #56 on: December 01, 2024, 05:46:53 AM »
Oh yeah, 377 was 400-4. We didn't get the 350-4 in the UK, there are some about but they were never imported by Honda UK to my knowledge. I just equate the 350 and the 400 as essentially the same bike, they share so many parts.

550F2 has an awful lot of 404 parts fitted as well, shares a lot with the 550K3.

My post was to inform Jonda500 that he must have misread the 323 middle number for the 550F, easy to do, they look the same at first glance especially if you're expecting to see 323.

Offline jonda500

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #57 on: December 01, 2024, 04:35:45 PM »
Actually I mistyped in my previous post (mixed up the K and F numbers) - to be clear I will copy from Honda parts lists the finned JOINT part number and the COLLAR part number:

CB500  18231-323-000  JOINT 
             18233-107-000  COLLAR

CB550F 18231-323-000  JOINT
              18233-107-000  COLLAR

CB550K 18231-333-010  JOINT
&500K3 18233-107-000  COLLAR

CB400    18231-333-010  JOINT
               18233-303-010  COLLAR

well that is still pretty unclear, but I am going to go out on a limb and say that they are ALL interchangeable on all of the smaller SOHC/4 Hondas, John
p.s. I checked with my strong glasses on - the 500K3/550K definitely has 333 model code number???
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...

Offline Oddjob

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #58 on: December 01, 2024, 05:04:57 PM »
Actually we are both right and both wrong. I have this annoying habit of always selecting the CB550F2 whenever I go to look up parts for the 550f, mainly because that’s the one I owned, however after your post I thought, did I misread the parts book? But no I didn’t and neither did you. The 550f and 550f1 did indeed carry on using the old 500 exhaust clamp, the 323 middle number, however that changed for the 550f2, not only did they change to the 350f part, 333 middle part number but they ditched the spring washer and went to a flanged 6mm nut.

No idea why Honda suddenly changed the clamp, maybe they ran out of the 500 clamps and were scratching around looking for an alternative. Or maybe it’s 2 grams lighter and as they say “ every little helps”

Offline Ozzybud

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #59 on: December 01, 2024, 06:11:44 PM »
Likely the 333 collars that were designed for the 350F and also used on the 400F's which never used spring washers were a little thinner and gave the flex/tension required to eliminate the Washers.  Honda Engineering was on point!
1976 Z50A YELLOW
1970 CT70 BLUE
1971 CT70H ORANGE
1972 CT70H GREEN
1973 CL200 BLUE
1973 CB350F RED
1975 CB360T RED
1975 CB400F BLUE
1975 CB550 ORANGE
1976 CB750F RED

Offline Oddjob

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Re: Exhaust flange/clamp -- how to clean 'em up? Paint? Treat?
« Reply #60 on: December 01, 2024, 06:31:46 PM »
That’s entirely possible. Plus Honda really did like to save money whenever possible 😁😁😁