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Offline cb1992

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550F Fork Tubes
« on: October 16, 2020, 01:00:41 pm »
Hello all,

I am slowly restoring my 75 550F (will add pics later) and at some point i am going to need new fork tubes. The Honda part number is 51410-390-003 and I am having 0 luck in finding replacements. Anyone know where to get a set even if its reproductions?


http://forums.sohc4.net/index.php/topic,168074.msg1945906.html#msg1945906
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Offline scunny

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Re: 550F Fork Tubes
« Reply #1 on: October 16, 2020, 01:58:29 pm »
« Last Edit: October 16, 2020, 02:00:37 pm by scunny »
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Offline bryanj

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Re: 550F Fork Tubes
« Reply #2 on: October 16, 2020, 02:28:32 pm »
Have you tried Dave Silver
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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 RAFster122s

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Re: 550F Fork Tubes
« Reply #3 on: October 16, 2020, 03:23:38 pm »
CycleX carries repro forks
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Online Bankerdanny

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Re: 550F Fork Tubes
« Reply #4 on: October 16, 2020, 05:42:46 pm »
Frank's Forks. Sadly no longer located close to me, but if you won't need them immediately, after they settle into their new location and start taking orders they have a great reputation for making quality products: http://franksforks.com/
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"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline Little_Phil

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Re: 550F Fork Tubes
« Reply #5 on: October 17, 2020, 04:14:52 am »
I found the 390 550F stanchions difficult to find as they were unique to a couple of years of the 550F. Only needed one and paid about $200 a few years ago for a genuine one. Repros do come up mostly in the far east. Try here but shipping will be $$$.

http://firefoxracing.co.uk/parts-accessories/online-shop/fork-stanchions/honda-fork-stanchions/honda-cb550f-f1f2-fork-stanchion-1975-1980/

But as already mentioned hard chrome treatment will repair most. Other more temporary filling may work for a while and early Fs had gaitors.

Also just noticed Cruzinimage very cheap. Part no correct but note their comment regarding USA models. Are you 100% sure this is the no for your leg?

https://www.cruzinimage.net/2018/09/03/75-76-honda-cb550f-super-spot-front-fork-tube-inner-set-2tubes/
« Last Edit: October 17, 2020, 04:30:53 am by Little_Phil »
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Offline cb1992

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Re: 550F Fork Tubes
« Reply #6 on: November 01, 2020, 01:24:41 pm »
Hey guys, thanks for the replies! I tracked down each lead and they all lead to dead ends (see below). Beginning to feel defeated on this especially with how much I have spent to get here. Can i use tubes from another model? The ebay listing below matches all the measurements but says they dont fit an F. Thoughts?


https://www.ebay.com/i/232217313017?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=232217313017&targetid=935431406133&device=c&mktype=pla&googleloc=9018738&poi=&campaignid=10829254281&mkgroupid=106351005733&rlsatarget=pla-935431406133&abcId=9300396&merchantid=8099144&gclid=Cj0KCQjwufn8BRCwARIsAKzP694ClRBk8qUm24cXhCi5T1te5TzELcR--tzazY5f8Q-UJWslqjr1AoQaAtfMEALw_wcB


CMSNL - way to expensive, over $1,000

Dave Silver - Discontinued

CycleX - No longer supplying fork tubes per an email to customer support

Franks Forks - Put an email in
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Offline rosewood

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Re: 550F Fork Tubes
« Reply #7 on: November 01, 2020, 03:47:00 pm »
I picked up some cruzin image tubes for my 550f (japanese model imported to NZ) they fit fine and worked with my lowers.

Maybe throw up some pics of your your ones and the internals of the lowers (damper etc) and we can compare images and measurements and check whether they would work for you. Like others have said there were/are some variations between specific 550 models.
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Offline bryanj

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Re: 550F Fork Tubes
« Reply #8 on: November 02, 2020, 12:31:43 am »
Be expensive on carriage but a firm here in UK takes your tubes, straightens them then grind and hard chrome to size, never corrode again. Its about £180 GBP  including UK carriage if you are here in UK
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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 Flyin900

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Re: 550F Fork Tubes
« Reply #9 on: November 02, 2020, 01:15:48 am »
Look at the hard chrome option if you can’t find a replacement set. Contact some chrome platers in your area.
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Common sense.....isn't so common!

1966 CL77 - 305cc - Gentleman's Scrambler
1967 CL175K0 - Scrambler #802 engine
1972 CB350F - Candy Bacchus Olive - Super Sport
1973 CB350F - Flake Matador Red - Super Sport
1975 CB400F - Parakeet Yellow - Super Sport
1976 CB400F - Varnish Blue - Super Sport
1976 GL1000 - Goldwing Standard
1978 CB550K - Super Sport
1981 GL1100 - Goldwing Standard
1982 CM450A - Hondamatic
1982 CB900C - Custom
1983 CX650E - Eurosport
1983 CB1000C - Custom X 2 Bikes now - both restored
1983 CB1100F - Super Sport - Pristine example
1984 GL1200 - Goldwing Standard

Offline bryanj

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Re: 550F Fork Tubes
« Reply #10 on: November 02, 2020, 02:38:23 am »
You need engineers that plate not just platers
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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 cb1992

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Re: 550F Fork Tubes
« Reply #11 on: November 02, 2020, 12:23:03 pm »
Quote from: rosewood on November 01, 2020, 03:47:00 pm
I picked up some cruzin image tubes for my 550f (japanese model imported to NZ) they fit fine and worked with my lowers.

Maybe throw up some pics of your your ones and the internals of the lowers (damper etc) and we can compare images and measurements and check whether they would work for you. Like others have said there were/are some variations between specific 550 models.

I will upload pics tonight, but as far as i can tell the tubes that came with the bike are incorrect. I tried to reassemble and the piston just fell out of the tube and didnt stay in like it should.

Quote from: rosewood on November 01, 2020, 03:47:00 pm
I picked up some cruzin image tubes for my 550f (japanese model imported to NZ) they fit fine and worked with my lowers.

Maybe throw up some pics of your your ones and the internals of the lowers (damper etc) and we can compare images and measurements and check whether they would work for you. Like others have said there were/are some variations between specific 550 models.

This site makes me nervous to order from. I got burned by a similar site that took my order three times and didnt ship any product. The wording and page layout is the exact same so im hesitant to order from them, but thanks!
« Last Edit: November 02, 2020, 12:25:56 pm by cb1992 »
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Offline rosewood

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Re: 550F Fork Tubes
« Reply #12 on: November 02, 2020, 02:00:27 pm »
He also sells on ebay which is how I picked up mine. Just be very sure they are the ones you want as any question or complaints about his products and he will block you as a purchaser. I am blocked btw lol..
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Offline jlh3rd

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Re: 550F Fork Tubes
« Reply #13 on: November 02, 2020, 03:46:37 pm »
Quote from: cb1992 on November 01, 2020, 01:24:41 pm
Hey guys, thanks for the replies! I tracked down each lead and they all lead to dead ends (see below). Beginning to feel defeated on this especially with how much I have spent to get here. Can i use tubes from another model? The ebay listing below matches all the measurements but says they dont fit an F. Thoughts?


https://www.ebay.com/i/232217313017?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=232217313017&targetid=935431406133&device=c&mktype=pla&googleloc=9018738&poi=&campaignid=10829254281&mkgroupid=106351005733&rlsatarget=pla-935431406133&abcId=9300396&merchantid=8099144&gclid=Cj0KCQjwufn8BRCwARIsAKzP694ClRBk8qUm24cXhCi5T1te5TzELcR--tzazY5f8Q-UJWslqjr1AoQaAtfMEALw_wcB


CMSNL - way to expensive, over $1,000

Dave Silver - Discontinued

CycleX - No longer supplying fork tubes per an email to customer support

Franks Forks - Put an email in

i came up with around $665 american....for two tubes from cms.....still expensive, but not $1000.
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Offline cb1992

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Re: 550F Fork Tubes
« Reply #14 on: November 05, 2020, 08:56:01 pm »
Quote from: rosewood on November 02, 2020, 02:00:27 pm
He also sells on ebay which is how I picked up mine. Just be very sure they are the ones you want as any question or complaints about his products and he will block you as a purchaser. I am blocked btw lol..

Are you referring to the ones below? I am not sure what "small insert" he is referencing. I wonder if they would work.

https://www.ebay.com/i/232217313017?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=232217313017&targetid=935431406133&device=c&mktype=pla&googleloc=9018738&poi=&campaignid=10829254281&mkgroupid=106351005733&rlsatarget=pla-935431406133&abcId=9300396&merchantid=8099144&gclid=Cj0KCQjwufn8BRCwARIsAKzP694ClRBk8qUm24cXhCi5T1te5TzELcR--tzazY5f8Q-UJWslqjr1AoQaAtfMEALw_wcB
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Offline Little_Phil

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Re: 550F Fork Tubes
« Reply #15 on: November 06, 2020, 02:31:15 am »
This is the bottom of the 550F fork tube. Seems to be made up on two or three bits in there. Retains the damper tube that goes in from the top. 550Ks had a loose part here and a small rebound spring and different damper.

 
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Offline rosewood

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Re: 550F Fork Tubes
« Reply #16 on: November 08, 2020, 01:23:11 pm »
No.....these ones..

 https://www.ebay.com/itm/75-76-HONDA-CB550F-SUPER-SPOT-FRONT-FORK-TUBE-INNER-SET-2TUBES-CI-CB550FFTS-1/133023019216?hash=item1ef8ca30d0:g:SYQAAMXQaBtQ~5FP

I recommend you take some decent pictures of yours and post them up so people can see what you have or referring to..



Quote from: cb1992 on November 05, 2020, 08:56:01 pm
Quote from: rosewood on November 02, 2020, 02:00:27 pm
He also sells on ebay which is how I picked up mine. Just be very sure they are the ones you want as any question or complaints about his products and he will block you as a purchaser. I am blocked btw lol..

Are you referring to the ones below? I am not sure what "small insert" he is referencing. I wonder if they would work.

https://www.ebay.com/i/232217313017?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=232217313017&targetid=935431406133&device=c&mktype=pla&googleloc=9018738&poi=&campaignid=10829254281&mkgroupid=106351005733&rlsatarget=pla-935431406133&abcId=9300396&merchantid=8099144&gclid=Cj0KCQjwufn8BRCwARIsAKzP694ClRBk8qUm24cXhCi5T1te5TzELcR--tzazY5f8Q-UJWslqjr1AoQaAtfMEALw_wcB
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Offline Marks78

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Re: 550F Fork Tubes
« Reply #17 on: November 10, 2020, 11:24:36 am »
Not exactly in the neighborhood for you, but these guys built a set for my 1978 CB750K several years ago and did a great job. If you can provide the measurements they can build it. Stock or custom. As I recall the price was competitive.  Best of luck!
Cannon RaceCraft
201 East Hill Street
Oklahoma City, OK 73105
405-524-7223
405-524-4686
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Current Stable:
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1982 XT200J
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1985 V30 Magna
1998 VT1100 Spirit
2006 GoldWing

Offline cb1992

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Re: 550F Fork Tubes
« Reply #18 on: November 12, 2020, 09:09:49 pm »
Quote from: Little_Phil on November 06, 2020, 02:31:15 am
This is the bottom of the 550F fork tube. Seems to be made up on two or three bits in there. Retains the damper tube that goes in from the top. 550Ks had a loose part here and a small rebound spring and different damper.

That looks to be what mine does not have. That being said, I can say for certain the tubes that came with my bike ARE NOT the ones that should be in it. When I got inside them someone was in there already.
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Offline bryanj

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Re: 550F Fork Tubes
« Reply #19 on: November 13, 2020, 12:52:16 am »
Mustve been a small person
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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 cb1992

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Re: 550F Fork Tubes
« Reply #20 on: November 24, 2020, 02:06:05 pm »
Quote from: Marks78 on November 10, 2020, 11:24:36 am
Not exactly in the neighborhood for you, but these guys built a set for my 1978 CB750K several years ago and did a great job. If you can provide the measurements they can build it. Stock or custom. As I recall the price was competitive.  Best of luck!
Cannon RaceCraft
201 East Hill Street
Oklahoma City, OK 73105
405-524-7223
405-524-4686

Gave them a call and their suspension tech should be calling me back any day now. Thanks!
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