Author Topic: CB750K6 Front fort too narrow  (Read 1762 times)

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Offline HairyPotter

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CB750K6 Front fort too narrow
« on: June 05, 2020, 03:37:54 PM »
Hello,
I have a '76 CB750. I recently took both wheels into the shop to get new tires put on. For some reason the front wheel no longer fits. The gap is too narrow to line up with the axle. The guy at the shop said my forks may have previously been bent and then sprung together when I removed the wheel. The bike did fall over last winter when rain made the ground soft and the center stand sank in the mud. I don't think it was a hard fall, probably slow and steady.

Regardless, does anyone have an tips on how I can spread my forks enough to get my front wheel on? I only need to spread it a half an inch or so.

I was going to use my the smallest bottle jack I could find but it's too wide to fit between the forks.




Offline Bankerdanny

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Re: CB750K6 Front fort too narrow
« Reply #1 on: June 05, 2020, 03:48:04 PM »
You should be able to spread them with your hands. However if they are bent that much I would expect that they would be binding up and working like crap.

Can you post a picture of where the bottoms hit the axle?
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Offline seanbarney41

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Re: CB750K6 Front fort too narrow
« Reply #2 on: June 05, 2020, 04:36:22 PM »
betcha the axle and spacers are assembled wrong
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Offline Stev-o

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Re: CB750K6 Front fort too narrow
« Reply #3 on: June 05, 2020, 05:45:19 PM »
betcha the axle and spacers are assembled wrong

+1....try turning the spacer around.
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Online scottly

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Re: CB750K6 Front fort too narrow
« Reply #4 on: June 05, 2020, 07:03:30 PM »
Please post pictures of the axle and hub from both sides.
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Online bryanj

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Re: CB750K6 Front fort too narrow
« Reply #5 on: June 05, 2020, 10:55:00 PM »
Nut on axel wrong way wrong
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Offline HairyPotter

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Re: CB750K6 Front fort too narrow
« Reply #6 on: June 06, 2020, 06:47:02 AM »
Well, right after I posted, I came up with this configuration with about $10 in parts from the hardware store:

Offline HairyPotter

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Re: CB750K6 Front fort too narrow
« Reply #7 on: June 06, 2020, 06:49:55 AM »
seanbarney41- why would turning the spacer around make a difference?

+1....try turning the spacer around.
[/quote]

Offline HairyPotter

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Re: CB750K6 Front fort too narrow
« Reply #8 on: June 06, 2020, 08:10:35 AM »
Here are pictures of the left and right sides. Speedo gear on the left, disc on the right. I think I have the axle bolt and nut oriented properly from what I've seen in the manuals.

Offline 754

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Re: CB750K6 Front fort too narrow
« Reply #9 on: June 06, 2020, 12:19:45 PM »
 Stop trying to spread your folks   I wrote a detailed post yesterday on how to check, but it did not load. Main thing if forks have not been removed or turned since you took wheel off, there is no need to  jack them.
 I can post more info late tonite , I am in the ferry line up and we are sailing soon into no WiFi waters.
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Offline robvangulik

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Re: CB750K6 Front fort too narrow
« Reply #10 on: June 06, 2020, 12:30:20 PM »
Here are pictures of the left and right sides. Speedo gear on the left, disc on the right. I think I have the axle bolt and nut oriented properly from what I've seen in the manuals.
You know the brake caliper sits on the left side?

Online HondaMan

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Re: CB750K6 Front fort too narrow
« Reply #11 on: June 06, 2020, 01:36:32 PM »
In the pix, it appears like your speedometer drive is not fully seated, Undo the axle bolt/nut and try again?
The front forks usually "pull in" about 2-3mm when the front wheel is pulled out, due to the action of the front fender's mount bracket. The general idea is to add a small amount of preload to the assembly to prevent 'thunking' as the insides of the forks wear a little from the motions.
See SOHC4shop.com for info about the gadgets I make for these bikes.

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Offline 754

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Re: CB750K6 Front fort too narrow
« Reply #12 on: June 06, 2020, 10:25:03 PM »
Your Speedo drive might not be seated as Honda man said, and 2 more things...
... first off the part of the able sticking out of Speedo drive appears a bit short, not sure tho.
 And the outer edge of Speedo drive looks  like its marked up like if wheel assembly was too wide and being forced into the fork assembly.
 What I had said yesterday that failed to get printed...
 Easy way to check forks, with axle out of wheel.
 Block up bike of course, clampaxle on one fork leg, now loosen other forkin triple tree, and turn the steel fork tube slowly, dont let it fall out. If it is bent, you will see the lower leg move inand out on the. axle. Now repeat process on other fork.
 If there is a slight bend they can be set up  to be able to ride the bike easily. More on that later.
 
 So again I ask... have forks been loosened or taken out if the trees , since the wheel came off.
 Did the wheel fall out, or come out with difficulty.
 Have you taken axle out of the  hub , ever ?
 There may be a simple remedy to get you back riding , but you have to listen and give us a bit of  info.
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...

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Lost quite a few CB 750's along the way

Offline ekpent

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Re: CB750K6 Front fort too narrow
« Reply #13 on: June 07, 2020, 04:47:24 AM »
 I had a 750 that had a bent fork tube that was not even visually noticeable and the front rim went off and on fine. The way I discovered the problem was that the fork spring was very difficult to pull out and reinsert. Sure it was binding up while riding also and replaced it with another used one.
  Give Hondaman's suggestion a go.