« previous next »
Pages: [1]   Go Down

Author Topic: CB550 fuel lines  (Read 8014 times)

0 Members and 2 Guests are viewing this topic.

Offline joemcvw1951

  • Full Member
  • *
  • Posts: 76
CB550 fuel lines
« on: June 09, 2013, 12:15:46 PM »
I went through a lot of previous posts..   I want to replace my fuel lines which are feeling pretty hard & brittle , and install some inline fuel filters. The posts are clear that the correct OEM spec is 5.6mm ID, but it seems that a lot of people have used 1/4" or 3/8". or 5/16" pretty interchangeably without issues.

Interested in pros or cons and a recommendation please
Logged

Offline phil71

  • Master
  • *****
  • Posts: 1,813
Re: CB550 fuel lines
« Reply #1 on: June 09, 2013, 12:33:28 PM »
others will fit, and work, but the right size is a joy to work with.
Logged

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: CB550 fuel lines
« Reply #2 on: June 09, 2013, 03:49:31 PM »
5.5mm will stay on the barbs and not leak with or without hose clamps.

1/4 inch will work but you WILL need hose clamps to squeeze it down properly and reliably.

I have used 1/4 inch hose and regretted it.

Why do you want inline filters?  Honda includes a very good, reliable, and self cleaning filter for most of its models.  Some have a sediment bowl to  rinse out once in a blue moon.  It is especially difficult to use an in line filter and keep the constant gravity fall routing as the bike really should have.
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline phil71

  • Master
  • *****
  • Posts: 1,813
Re: CB550 fuel lines
« Reply #3 on: June 09, 2013, 04:11:32 PM »
I second that whole post. If you've torn your original screen, replace it. Inline filters are for quitters.
Logged

Offline joemcvw1951

  • Full Member
  • *
  • Posts: 76
Re: CB550 fuel lines
« Reply #4 on: June 09, 2013, 05:40:26 PM »
I had a lot of rust in the tank , since cleaned with the Yamalube system , I thought the inline filters might be a good precaution ?
Logged

Offline davidtime

  • Hot Shot
  • ***
  • Posts: 449
Re: CB550 fuel lines
« Reply #5 on: June 09, 2013, 05:48:36 PM »
Quote from: TwoTired on June 09, 2013, 03:49:31 PM
5.5mm will stay on the barbs and not leak with or without hose clamps.

1/4 inch will work but you WILL need hose clamps to squeeze it down properly and reliably.

I have used 1/4 inch hose and regretted it.

Why do you want inline filters?  Honda includes a very good, reliable, and self cleaning filter for most of its models.  Some have a sediment bowl to  rinse out once in a blue moon.  It is especially difficult to use an in line filter and keep the constant gravity fall routing as the bike really should have.

Know of a good place to get the 5.5 mm?
Logged

Offline Tews19

  • I am no
  • Really Old Timer ...
  • *******
  • Posts: 6,465
Re: CB550 fuel lines
« Reply #6 on: June 09, 2013, 07:30:28 PM »
Ebay. Guy sells 32 inches for 16 bucks. In search tab on ebay type in 5.5mm fuel line
Logged
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline Bankerdanny

  • Eventually I will be old enough in reality to be
  • Really Old Timer ...
  • *******
  • Posts: 7,626
  • Endeavor to persevere
Re: CB550 fuel lines
« Reply #7 on: June 10, 2013, 07:26:57 AM »
I ran a Mr. Gasket glass in-line filter with a replaceable element on my 550. Absolutely no issues with fuel flow.
Logged
"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 iron_worker

  • Master
  • *****
  • Posts: 2,081
Re: CB550 fuel lines
« Reply #8 on: June 10, 2013, 08:12:38 AM »
Go to a ATV/snowmobile/dirt bike shop and get yourself some 7/32" fuel line.

7/32" = .219"

5.5mm = .217"

I got 10' for $7.

IW
Logged

Offline new2bikes-again

  • Enthusiast
  • **
  • Posts: 101
    • wellandpond.com
Re: CB550 fuel lines
« Reply #9 on: June 10, 2013, 08:23:24 AM »
What if he has this petcock and screen? I haven't been able to locate this tube and screen. I don't want to be a quitter who uses inline filters!

I'm not sure which SOHC4 Joe has, but if he has the same petcock I have, I feel bad for him.
Logged

Offline iron_worker

  • Master
  • *****
  • Posts: 2,081
Re: CB550 fuel lines
« Reply #10 on: June 10, 2013, 08:43:04 AM »
I really have no problem with inline filters like a lot of people here seem to. You really do have to make sure that the lines only slope downwards towards the carbs though or you may trap air in the lines and starve the bike for fuel. The fuel filters make this much more difficult to do within the limited space... but not impossible.

IW
Logged

Offline joemcvw1951

  • Full Member
  • *
  • Posts: 76
Re: CB550 fuel lines
« Reply #11 on: June 10, 2013, 09:42:20 AM »
I have the petcock with the screen and bowl below the valve
Logged

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: CB550 fuel lines
« Reply #12 on: June 10, 2013, 09:56:33 AM »
Quote from: joemcvw1951 on June 10, 2013, 09:42:20 AM
I have the petcock with the screen and bowl below the valve

Must be a 74, or a tank from that or and earlier Cb500.

I like those, too.  If it fits through that screen mesh, there is nothing to stop it traveling all the way through the carb and out the exhaust pipe.
The screen cleans itself.  Big particles go to bottom of bowl, dropping off the screen above.  It really ought to take quite a while to fill the bowl completely and in the mean time, you will still get full flow through the filter.  In line filters reduce flow as they trap particles, so there will be some odd engine behavior just before they clog completely.  You must check in lines frequently if they are actually doing their job, or replace them at some unspecified routine interval, if their "preventive" nature is to be preserved.
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: CB550 fuel lines
« Reply #13 on: June 10, 2013, 10:00:27 AM »
Quote from: new2bikes-again on June 10, 2013, 08:23:24 AM
What if he has this petcock and screen? I haven't been able to locate this tube and screen. I don't want to be a quitter who uses inline filters!

I'm not sure which SOHC4 Joe has, but if he has the same petcock I have, I feel bad for him.

That's the 75-76 type.     
STRAINER SET    16952-341-671
The last one I bought was from the Honda dealer.   Have they been discontinued?
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline new2bikes-again

  • Enthusiast
  • **
  • Posts: 101
    • wellandpond.com
Re: CB550 fuel lines
« Reply #14 on: June 10, 2013, 09:34:48 PM »
I forgot to check David Spears, but Bike bandit, Z-1, & Honda, only show the type that you described earlier (TwoTired). The bowl that hangs down.

I found that ebay fuel line. If I could locate that tube & screen, I'd ditch the filters and run new line.

Did you guys see that post about these inline filters not liking moisture? The ones with the brass mesh element? I think HondaMan started it?
Logged

Offline goldarrow

  • one day, i'll be an
  • Old Timer
  • ******
  • Posts: 3,361
Re: CB550 fuel lines
« Reply #15 on: June 10, 2013, 09:50:15 PM »
check here for 7/32" fuel line. they have clear and colored fuel lines.  awhile back I bought a whole bunch of these to offset the shipping price, then shared with other members on the forums.  worked out pretty well







http://www.alssnowmobile.com/PRODUCTPARTS.ASPX?pn_deptid=304
« Last Edit: June 10, 2013, 09:56:25 PM by goldarrow »
Logged
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,805
Re: CB550 fuel lines
« Reply #16 on: June 10, 2013, 10:35:22 PM »
Quote from: new2bikes-again on June 10, 2013, 09:34:48 PM
I forgot to check David Spears, but Bike bandit, Z-1, & Honda, only show the type that you described earlier (TwoTired). The bowl that hangs down.

I found that ebay fuel line. If I could locate that tube & screen, I'd ditch the filters and run new line.

Did you guys see that post about these inline filters not liking moisture? The ones with the brass mesh element? I think HondaMan started it?

I put the part number I posted earlier (16952-341-671 ) into Google.  I didn't check stock at these sites, though.  But, they list it.
http://www.cmsnl.com/products/strainer-set_16952341671/
http://www.gearhead.com/honda-16952-341-671.html#/s/HOM//16952-341-671/1
http://www.partzilla.com/parts/detail/honda/HP-16952-341-671.html
http://www.ereplacementparts.com/strainer-set-p-1348176.html
http://www.ebay.com/itm/Honda-CB-750-Four-K6-Benzinhahn-Filter-Set-Original-/221205424086?pt=Motorrad_Kraftradteile&hash=item3380dee7d6
Logged
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline Duanob

  • Bold Timer
  • Old Timer
  • ******
  • Posts: 4,009
  • Gotcha!
Re: CB550 fuel lines
« Reply #17 on: June 11, 2013, 12:09:18 PM »
Quote from: phil71 on June 09, 2013, 04:11:32 PM
I second that whole post. If you've torn your original screen, replace it. Inline filters are for quitters.

Easy there big fella! My intake filters are failing me constantly. I clean them, check them, clean the tank and I still get crud in the carbs. Over flow drain leaks and a crappy running motor are the symptoms. I had to completely drain and clean my tank every year, take the bowls off the clean them and the pilot jets. This gets old. Once I put inline filters on no problems. I still see the crud that comes from the gas pump in the clear filters, its no wonder our bikes even run with this crap. And no i don't go back to the same pump. Not even the same company.
« Last Edit: June 11, 2013, 12:11:50 PM by Duanob »
Logged
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

  __o
_- \_<,
(*) /' (*)
Pages: [1]   Go Up
« previous next »