Author Topic: CB750 gas tanks  (Read 3335 times)

0 Members and 1 Guest are viewing this topic.

Offline bill440cars

  • I Feel Like I Am Becoming A Really
  • Really Old Timer ...
  • ******
  • Posts: 11,340
  • The Flying Dutchman
CB750 gas tanks
« on: December 31, 2005, 07:49:22 PM »
I was just browsing through Honda CB750K listings on ebay motors and I came across 2 gas tanks in seperate listings. The thing in, they had recessed filler necks and caps under a lid (or door). These were listed as 750K tanks. Am I nuts, I always thought those were 750F tanks and the 750 tanks had filler necks and caps that were slightly raised above the surface of the tank. Somebody tell me, because I do know from experience (as I'm sure lots of you do too), that some of these people don't know what they have and some just list their parts just any old way in hopes that it'll help draw attention to their items.   Thanks, Bill
PRAYERS ALWAYS FOR: Trevor, Bear, Jeff & Virginia & BRE 
"Because HE lives, I can face Tomorrow!"            
"Home In Arkansas Again" Member# 1969
  YOU ARE ONLY AS OLD AS YOU FEEL.........
  ............ Uh Oh!

              "Married To A Special Lady"

Main Rides: '07 Charger R/T, 69' GTX, '80 CBX & '83 GPZ1100
Builds: '92 Dakota Std Cab, '92 Club Cab & Super Hawk Cafe

Offline scondon

  • No way my run was THAT slow, must be an
  • Old Timer
  • ******
  • Posts: 3,125
  • Mmmm......tasty bugs
Re: CB750 gas tanks
« Reply #1 on: December 31, 2005, 08:39:45 PM »
77-78 750k tanks have "caps under a lid". They look similar to F tanks but are much fatter and rounder looking.
Give me..a frame to build a bike on, and my imagination will build upon that frame

Offline bill440cars

  • I Feel Like I Am Becoming A Really
  • Really Old Timer ...
  • ******
  • Posts: 11,340
  • The Flying Dutchman
Re: CB750 gas tanks
« Reply #2 on: December 31, 2005, 08:50:18 PM »
Thanks Scondon, I appreciate that. That's why I called on you guys for some info. I thought I was right but, I wanted to be sure. Thanks again. I'm gone for now, Bill
PRAYERS ALWAYS FOR: Trevor, Bear, Jeff & Virginia & BRE 
"Because HE lives, I can face Tomorrow!"            
"Home In Arkansas Again" Member# 1969
  YOU ARE ONLY AS OLD AS YOU FEEL.........
  ............ Uh Oh!

              "Married To A Special Lady"

Main Rides: '07 Charger R/T, 69' GTX, '80 CBX & '83 GPZ1100
Builds: '92 Dakota Std Cab, '92 Club Cab & Super Hawk Cafe

Offline seaweb11

  • 1st Mate &
  • Really Old Timer ...
  • ******
  • Posts: 6,153
  • Ride & Smile
    • Playground Directory
Re: CB750 gas tanks
« Reply #3 on: December 31, 2005, 08:58:33 PM »
Long live the K8s and the final design that came out of all those other tries ;D

Kidding..no hate mail please 8)

Offline Geeto67

  • A grumpy
  • Old Timer
  • ******
  • Posts: 2,605
Re: CB750 gas tanks
« Reply #4 on: January 01, 2006, 10:05:35 AM »
Since we are on the subject....are the cb750A tanks the same as the 77-78 cb750K tanks?

Maintenance Matters Most

damn_yankee

  • Guest
Re: CB750 gas tanks
« Reply #5 on: January 01, 2006, 10:45:04 AM »
Another question on this topic...
Will an early tank (K0-K6) fit on a K7/K8 (without mods)?

I personally like the earlier tank style than the one on my K8.

Thanks,

damn_yankee

Offline jaknight

  • Hot Shot
  • ***
  • Posts: 635
  • ....Round Town Ride......
Re: CB750 gas tanks
« Reply #6 on: January 01, 2006, 12:18:11 PM »
Another question on this topic...
Will an early tank (K0-K6) fit on a K7/K8 (without mods)?

I personally like the earlier tank style than the one on my K8.

Thanks,

damn_yankee

Hi everyone,

   Sorry I can't help you about the interchanging of tanks; but I do have agree with you damn_yankee;  I do like that filler cap standing clear of the tank with the extra touches of chrome.
Many years ago (in th '60s) Corvette did the same type of thing with the chromed gas tank cap.  I thought it looked great!
"THE PEN IS MIGHTIER THAN THE SWORD........
..........EXCEPT IN A SWORD FIGHT"
___________________________________________
"There is nothing new under the sun.........But there are many old things we do not know"
BIBLE ---> Basic Instructions Before Leaving Earth

Offline eurban

  • Master
  • *****
  • Posts: 1,625
Re: CB750 gas tanks
« Reply #7 on: January 01, 2006, 01:21:25 PM »
The 750 auto tanks are pretty  much the same as the 77/78 k tanks except that they have a gas guage underneath the flap.  The k tanks have the opening for the guage plugged over.

Offline ericstew

  • Full Member
  • **
  • Posts: 35
Re: CB750 gas tanks
« Reply #8 on: January 01, 2006, 02:22:44 PM »
 Here are a few things about sohc4 gas tank:
-K0 sandcast:wrinkles gas tank+you can open the gas cap with only one hand(later 2 hands no key),fuel capacity between 18 and 19 liters
-K0(diecast)/K1/K2 same gas tank no wrinkles on bottom
-K3/K4 you need a key to open the gas cap.You can fit a lock on earlier models but will have to change the gas cap
-K5 the fuel peecock is relocated on the left side
-K7/K8/F1/F2/F3 new tank with gas cap under a locked flap
-A0/A1/A2 K7 tank+ gas guauge
You  can fit a K2 tank on a F1 as the frame fixing points  didn't change.
Bye ;)

cb 750 k2 950SS2 Japauto
cb 750 k6 1000VX Japauto
cb 750 F1 "cafe racer"
cb 750 k3 "cafe racer"
cb 750 k2
cb 750 k7 "cafe racer"

Offline jaknight

  • Hot Shot
  • ***
  • Posts: 635
  • ....Round Town Ride......
Re: CB750 gas tanks
« Reply #9 on: January 01, 2006, 03:16:23 PM »
Hey You All,

   Eric ---------> Some good handy info.  I wish you would drop by more often!
   ~ ~ ~ jaknight ~ ~ ~
   

[attachment deleted by admin]
"THE PEN IS MIGHTIER THAN THE SWORD........
..........EXCEPT IN A SWORD FIGHT"
___________________________________________
"There is nothing new under the sun.........But there are many old things we do not know"
BIBLE ---> Basic Instructions Before Leaving Earth

Offline Geeto67

  • A grumpy
  • Old Timer
  • ******
  • Posts: 2,605
Re: CB750 gas tanks
« Reply #10 on: January 02, 2006, 08:32:45 AM »
I thought you could put any tank on any cb750 but the seats wouldn't line up. YOu could put a K0-K6 tank on a F but the seat would have a gap, and the F tank on a k0-k6 the seat wonlt fit at all, meaning the mountig points are the same for all cb750s, just the seats present the fitment issues.
Maintenance Matters Most

Offline ericstew

  • Full Member
  • **
  • Posts: 35
Re: CB750 gas tanks
« Reply #11 on: January 02, 2006, 10:02:49 AM »
I just meant the fitting points where the same for the tank,but it's right,not for the seat... ;)
cb 750 k2 950SS2 Japauto
cb 750 k6 1000VX Japauto
cb 750 F1 "cafe racer"
cb 750 k3 "cafe racer"
cb 750 k2
cb 750 k7 "cafe racer"

Offline andy750

  • Really Old Timer ...
  • ******
  • Posts: 6,844
Re: CB750 gas tanks
« Reply #12 on: August 13, 2010, 07:23:55 AM »
Bringing this topic back from the dead....

Does anyone know if a K8 tank will fit (at frame and seat) on an early 750K bike?

I am looking for the extra fuel capacity..photos would be great  as well ;)

**EDIT - I answered my own question today - no the K8 tank will not fit an early K frame with stock seat. The K8 tank is too long and so the stock seat will need to be cut short to make it fit with stock mounts and K8 tank....

thanks
Andy

« Last Edit: August 15, 2010, 06:06:33 PM by andy750 »
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

The SOHC 2015 Calendar - accepting photos!  - http://forums.sohc4.net/index.php?topic=139893.msg1584175#msg1584175

Offline andy750

  • Really Old Timer ...
  • ******
  • Posts: 6,844
Re: CB750 gas tanks
« Reply #13 on: August 15, 2010, 06:08:18 PM »
Edit - see above - problem solved...K8 tank will not fit an early K frame with stock seat.
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

The SOHC 2015 Calendar - accepting photos!  - http://forums.sohc4.net/index.php?topic=139893.msg1584175#msg1584175

Online 754

  • Really Old Timer ...
  • ******
  • Posts: 17,475
Re: CB750 gas tanks
« Reply #14 on: August 15, 2010, 06:36:54 PM »
750 A tank , not only has the guage, it has additional clearance for the raised frame tubes..

 And I think the lower edge is different as the seat/ sidecovers has a different look..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com

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
69 z50
OHV 200..(Trail 90)

Offline Old Scrambler

  • My CB750K3 has been in 38 States & 5 Provinces
  • Master
  • *****
  • Posts: 2,468
Re: CB750 gas tanks
« Reply #15 on: August 15, 2010, 06:50:46 PM »
My K3 and my brother-in-law's K4 do not have key-locks........
Dennis in Wisconsin
'64 Triumph Cub Bonneville Salt Flats AMA Record Holder
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2000 Aprilia Pegasso

Offline andy750

  • Really Old Timer ...
  • ******
  • Posts: 6,844
Re: CB750 gas tanks
« Reply #16 on: August 15, 2010, 06:51:09 PM »
750 A tank , not only has the guage, it has additional clearance for the raised frame tubes..

 And I think the lower edge is different as the seat/ sidecovers has a different look..


Do you know if this fits the early K frames? It looks like the K8 tank which does not fit - probs with stock seat.
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

The SOHC 2015 Calendar - accepting photos!  - http://forums.sohc4.net/index.php?topic=139893.msg1584175#msg1584175

Online 754

  • Really Old Timer ...
  • ******
  • Posts: 17,475
Re: CB750 gas tanks
« Reply #17 on: August 15, 2010, 08:20:13 PM »
Yeah, 73  74 I think had no lock, unless you went in for the recall.. I did not, nor did Old Scrambler, Rodell,  or Cavebear..

 The A had a lowered looking seat like 400 twins, 185s, GB 500s etc.... so if you trimmed or got a seat to fit, It may not look right.. but you can probably make it work..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com

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
69 z50
OHV 200..(Trail 90)

Offline GammaFlat

  • Master
  • *****
  • Posts: 1,578
  • humanitas, qualitas, quantitas and velocitas
Re: CB750 gas tanks
« Reply #18 on: August 15, 2010, 08:47:37 PM »
My K6 is "lockless" as well.  

I have mixed feelings about the "K7 change".  The CB750 needed an updated look and at the time it was probably the right thing to do but to lots of folks (me included), the retro look of K0-K6 (and especially the K0) is really hot. 
« Last Edit: August 15, 2010, 09:02:14 PM by GammaFlat »
K4 - hmmm.  after K6 is done. 
K6 - Get all the king's horse's and men
K7 - my 2nd love (did I say that?)
K8 - Prolly the next SOHC I have on the road
05 KLR650 - Don't knock 'em 'til you try 'em.  685 might be in order.

 

;
Honda