Author Topic: K7 Float Question  (Read 751 times)

0 Members and 1 Guest are viewing this topic.

Offline AintNoEasyWay

  • Hot Shot
  • ***
  • Posts: 706
K7 Float Question
« on: November 26, 2013, 07:53:47 AM »
Hi everyone, I'm on my last chore before putting my carbs back on my K7 -- adjusting carb floats. I started to adjust the tangs on each float and realized I wasn't haven't much luck getting them to change float height. I then looked at my floats and noticed that the floats on carbs 2 and 4 seem to hang much lower than those on 1 and 3, and it seems to more than just an issue of adjustment. But as a newbie, I want to be sure I'm right about this.

I've attached a photo below and hopefully you can see that two of the floats hang much lower. I checked the metal part of the float that comes in contact with the carb, and this metal piece seems like it's bent back further on the floats that hang lower.

These lower floats also appear to be marked 'n' whereas the floats the don't hang as low are marked 'k', like my old floats that I've replaced.

Hopefully this explanation makes sense. I just need to figure out if I've somehow been sent the wrong floats with two of my rebuild kits (everything else from the kit was correct). Thanks!

Offline flybox1

  • My wife thinks I'm a
  • Really Old Timer ...
  • *******
  • Posts: 14,301
Re: K7 Float Question
« Reply #1 on: November 26, 2013, 09:17:29 AM »
Those look all the same.  Are they hanging up on a burr on the float pin? 
To set them..just bend the tang (more forcefully) to get the top (flat part) of the floats to be in line with the top of the PILOT JET.
If you feel the floats are of different styles (buoyancy), and you want to continue to use them, you'll need to verify fuel height using the clear tube method...
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline madmtnmotors

  • When did I get to be a
  • Really Old Timer ...
  • *******
  • Posts: 6,110
  • Sunny Central Florida
Re: K7 Float Question
« Reply #2 on: November 26, 2013, 09:35:38 AM »
There is another "tang' to adjust float drop. They should be even, and there is a specification for 'float drop". Look at the float arm next to the OTHER POST, the post opposite of the ones pictured above. In the pictures above the pivot post that is shown is to the right of the picture. Look at the pivot post that would be to the left and you will see a tang on the float arm that comes to rest against the float pivot post that is used to adjust the float drop.
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
                                          
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!

Offline AintNoEasyWay

  • Hot Shot
  • ***
  • Posts: 706
Re: K7 Float Question
« Reply #3 on: November 26, 2013, 09:53:00 AM »
There is another "tang' to adjust float drop. They should be even, and there is a specification for 'float drop". Look at the float arm next to the OTHER POST, the post opposite of the ones pictured above. In the pictures above the pivot post that is shown is to the right of the picture. Look at the pivot post that would be to the left and you will see a tang on the float arm that comes to rest against the float pivot post that is used to adjust the float drop.

Cool. Thanks for the replies. Yes, those other "tangs" are further back on the floats that have the letter "n" on them. I didn't know if it was possible to adjust this part of the metal and certainly didn't want to break it off.

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,717
Re: K7 Float Question
« Reply #4 on: November 26, 2013, 11:55:42 AM »
Hi everyone, I'm on my last chore before putting my carbs back on my K7 -- adjusting carb floats. I started to adjust the tangs on each float and realized I wasn't haven't much luck getting them to change float height. I then looked at my floats and noticed that the floats on carbs 2 and 4 seem to hang much lower than those on 1 and 3, and it seems to more than just an issue of adjustment. But as a newbie, I want to be sure I'm right about this.

I've attached a photo below and hopefully you can see that two of the floats hang much lower. I checked the metal part of the float that comes in contact with the carb, and this metal piece seems like it's bent back further on the floats that hang lower.

These lower floats also appear to be marked 'n' whereas the floats the don't hang as low are marked 'k', like my old floats that I've replaced.

Hopefully this explanation makes sense. I just need to figure out if I've somehow been sent the wrong floats with two of my rebuild kits (everything else from the kit was correct). Thanks!

I have no idea what you are doing. The photos make no sense at all.
Just measure the float height with the carb upside down or laying on its side.
Use a ruler.
With the K7 and K8

The top of the float (when upside down ) should be level with the pilot jet.
K7 and K8 ONLY!. The float tang should be JUST touching.

You do not need to use any clear tube.
Just MEASURE like the book says.
The book says to measure BEFORE....BEFORE any clear tube method is used.
AND it is not even necessary to use that clear tube method.

« Last Edit: November 26, 2013, 12:03:30 PM by lucky »

Offline flybox1

  • My wife thinks I'm a
  • Really Old Timer ...
  • *******
  • Posts: 14,301
Re: K7 Float Question
« Reply #5 on: November 26, 2013, 12:00:48 PM »
sure they make sense, if you read the whole post.
he's not measuring float height, he's wondering why he's got different ball float sag  ::)
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,717
Re: K7 Float Question
« Reply #6 on: November 26, 2013, 01:34:12 PM »
look at the difference between photo #11 and photo#10