Author Topic: Hose Connections from Air Box and from Carb # 2  (Read 873 times)

0 Members and 1 Guest are viewing this topic.

Offline Lloyd

  • Full Member
  • *
  • Posts: 2
Hose Connections from Air Box and from Carb # 2
« on: November 27, 2017, 10:00:38 am »
Hello, I am new to this forum and this is a new Bike for me so I have a few questions.

1. to start since I am replacing Carb. Pods for the Original Air-Breather. The original air breather has a hose connection top center, I do not know where this connects, assume it is a Vacuum Connection but could not find where, after looking further I found a hose with no connection going to the Oil Tank I believe, that must be like a PCV Valve Connection to the crankcase or something like that. I did find a hose that looks like it is going up to the Oil Tank that is not connected - Yellow Hose with a ring connector but not connected to anything.

2. there is also a small hose coming from carb # 2 and is loose with a broken barb inside, looks like another Vacuum Connection?

in my manual I see hose connections to the Carb and Solenoid that includes a check valve.

Any assistance will be greatly appreciated

Thanks
Lloyd
11-27

Offline Lloyd

  • Full Member
  • *
  • Posts: 2
Re: Hose Connections from Air Box and from Carb # 2
« Reply #1 on: November 27, 2017, 10:33:50 am »
Forgot to add my Bike Data:

1978 Honda 750 4 SOHC
Black, Gorgeous Bike needing a little TLC but in excellent condition.

Online 754

  • Really Old Timer ...
  • *******
  • Posts: 28,472
Re: Hose Connections from Air Box and from Carb # 2
« Reply #2 on: December 05, 2017, 04:53:49 pm »
77/78 has an air canister thing under the aircleaner, uses more hoses.
You can ask these questions in sohc/4 bikes, you will get help faster.
 Welcome aboard.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline madmtnmotors

  • When did I get to be a
  • Really Old Timer ...
  • *******
  • Posts: 5,702
  • Sunny Central Florida
Re: Hose Connections from Air Box and from Carb # 2
« Reply #3 on: December 05, 2017, 05:10:08 pm »
The 77/78 K and 75 thru 78 F models use a vapor separator canister under the battery box. The valve cover vent hose runs to the upper connection on this vapor separator, the middle connector on the separator connects to the top of the air box, and the bottom connector on the separator should have a hose that runs around and under the front of the swingarm then towards the rear with a plug in the end of it. Periodic maintenance indicates removal of the plug to drain any accumulated moisture. This hose was originally secured to the right muffler bracket. There should be some parts fiches that show this assembly as well as some manuals.

Or you could just connect the valve cover vent to the airbox.
TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
                                           http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
                                           http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                           http://oldmanhonda.com/MC/wiring750K1.html
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!