Author Topic: Is it possible to remove hub bolts? custom 76' CB750F  (Read 3110 times)

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Offline Foyil100

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Is it possible to remove hub bolts? custom 76' CB750F
« on: January 31, 2015, 10:03:18 PM »
Hi All,

I used a 76' CB750F rear hub to create a custom rear wheel for my 78' CB750F, only problem is that since I am going with a wider sportbike tire I am going to need to use a spacer between my rear sprocket and the hub. That leads me to the issue at hand...the hub bolts are not long enough, that is, they do not give enough thread to put a nut on top of the sprocket (see pics below). I'm of the assumption that the hub bolts can be removed (I think they are threaded in??) but I had the whole hub powdercoated so its damn near impossible to get them to move.

So..
1) Are the bolts removable?
2) If yes, can I just find longer ones to give me enough space to bolt the sprocket and spacer on?
2) If yes to both above, whats the best way to get the bolts out? Take it back to the powdercoating shop and have him melt the coating off so I can get them out?

Thank you so much in advance :)

Sean





Here is a pic of underneath the hub, looking at the bottom of the bolt:
« Last Edit: January 31, 2015, 10:05:46 PM by Foyil100 »

Offline KRONUS0100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #1 on: February 01, 2015, 06:51:27 AM »
mine came out of the original f hub with a pair of ball peen hammers.  if i remember right, they have a funny head so the dont turn when tightening the nuts.  really odd yours are that short looking................but you do have that spacer on there.   longer bolts might work
MATT
current bikes:  1976 CB750F, 1981 GS1100E
bikes owned:1981 GL1100I, 1990 GS500E, 1981 GS850, 1977 and 1979 GS750, 1974 CB750, 1975 CB750, and a 1982 GS750E

Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #2 on: February 01, 2015, 06:31:36 PM »
mine came out of the original f hub with a pair of ball peen hammers.  if i remember right, they have a funny head so the dont turn when tightening the nuts.  really odd yours are that short looking................but you do have that spacer on there.   longer bolts might work

Are you saying I can hammer them out? If so, which direction - that is, do I hammer the back of them out through the hub or do I hit the top (threaded area) pushing them out through the bottom of the hub?

Offline KRONUS0100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #3 on: February 01, 2015, 06:40:33 PM »
hammer them out the backside, in other words  hit the ends with threads
MATT
current bikes:  1976 CB750F, 1981 GS1100E
bikes owned:1981 GL1100I, 1990 GS500E, 1981 GS850, 1977 and 1979 GS750, 1974 CB750, 1975 CB750, and a 1982 GS750E

Offline HondaMan

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #4 on: February 01, 2015, 07:05:34 PM »
umm...the larger question here is: how are you going to make the chain align from the engine to this widely-spaced-out sprocket? This much misalignment can make a chain climb right off the sprocket teeth.

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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #5 on: February 01, 2015, 07:30:45 PM »
umm...the larger question here is: how are you going to make the chain align from the engine to this widely-spaced-out sprocket? This much misalignment can make a chain climb right off the sprocket teeth.

 ::)

Reasonable question but I have a "widely-spaced-out" front sprocket as well :)

Offline Don R

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #6 on: February 01, 2015, 10:17:50 PM »
 Pics of that would be interesting.
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Offline Retro Rocket

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #7 on: February 02, 2015, 03:33:24 AM »
umm...the larger question here is: how are you going to make the chain align from the engine to this widely-spaced-out sprocket? This much misalignment can make a chain climb right off the sprocket teeth.

 ::)

Reasonable question but I have a "widely-spaced-out" front sprocket as well :)

Two things, One, you don't space out a front sprocket, you use an offset sprocket, two, a K8 rear hub is 10mm {3/8" ish}wider and would have been the better way to sort your rear hub problems out, where do you plan on getting longer sprocket studs from...?.... ;)
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Offline KRONUS0100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #8 on: February 02, 2015, 06:28:11 AM »
i forgot about the hub carrier differences.  I was using the original f model carrier on the comstars.   im now running KZ750 mags, and they are a different animal all together.  I had to replace a couple studs on the f model carrier, thats how i found out they do come out.
MATT
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #9 on: February 02, 2015, 12:13:16 PM »
umm...the larger question here is: how are you going to make the chain align from the engine to this widely-spaced-out sprocket? This much misalignment can make a chain climb right off the sprocket teeth.

 ::)

Reasonable question but I have a "widely-spaced-out" front sprocket as well :)

Two things, One, you don't space out a front sprocket, you use an offset sprocket, two, a K8 rear hub is 10mm {3/8" ish}wider and would have been the better way to sort your rear hub problems out, where do you plan on getting longer sprocket studs from...?.... ;)

I know it's called an offset sprocket, notice my quotes around my earlier comment, I was just poking fun :) sheesh c'mon old man lighten up ;)! I got a killer deal on that hub so I couldn't turn it down, either way I'll make it work well it just might require a little more input from my end. As for where I plan on getting the studs from, I spoke with Devin over at cognito moto who has been helping me along in the process and he actually picked up some studs from Advanced Auto on his cb750 build (he had the same issue). Now, I'm not sure if Advanced Auto is the way to go but as long as the threading is right I don't see why I'd have an issue finding studs.
« Last Edit: February 02, 2015, 12:16:28 PM by Foyil100 »

Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #10 on: February 02, 2015, 12:53:48 PM »
As for the threading being right, you need only match studs to nuts as far as the pitch is concerned. Length, and grade of stud is more critical. You're right, longer studs can be had, and you might need to swap nuts for pitch, but this can be done.

But again, please don't use crappy metal grade studs... Spend the money and buy the heavy duty stuff.
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #11 on: February 02, 2015, 12:58:13 PM »
As for the threading being right, you need only match studs to nuts as far as the pitch is concerned. Length, and grade of stud is more critical. You're right, longer studs can be had, and you might need to swap nuts for pitch, but this can be done.

But again, please don't use crappy metal grade studs... Spend the money and buy the heavy duty stuff.

Totally agree Calj, heavy duty stuff all the way. I'll tinker with it later this week and see if I can hammer those current studs out, if not I may have to take it to my local shop and see if he can press them out. I think my only concern with finding new/longer studs would be getting them to seat so they don't spin freely in the hub when I have to put the nuts on.

Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #12 on: February 02, 2015, 01:03:37 PM »
You might give a look thru arp-bolts.com at their catalog. They offer hub studs (not specific for CBs, but proper studs nonetheless). I think they're mostly 5/8" diameters and that would be pretty big compared to what's in there now (M10 or M12?).
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #13 on: February 02, 2015, 01:08:16 PM »
You might give a look thru arp-bolts.com at their catalog. They offer hub studs (not specific for CBs, but proper studs nonetheless). I think they're mostly 5/8" diameters and that would be pretty big compared to what's in there now (M10 or M12?).

Awesome! Thanks for the link, I will definitely take a look through there and see what I can find  :D

Offline Retro Rocket

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #14 on: February 02, 2015, 02:01:04 PM »
I still think a K8 hub is a better/cheaper option, I just bought one for $15 dollars, thats cheaper than the heavy duty ARP studs and no mods necessary, just how big a rear wheel do you plan on running...?
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #15 on: February 02, 2015, 02:30:54 PM »
I still think a K8 hub is a better/cheaper option, I just bought one for $15 dollars, thats cheaper than the heavy duty ARP studs and no mods necessary, just how big a rear wheel do you plan on running...?

The rear wheel is a 17x4.25 with a 160/60 tire

Offline Retro Rocket

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #16 on: February 02, 2015, 03:36:18 PM »
I still think a K8 hub is a better/cheaper option, I just bought one for $15 dollars, thats cheaper than the heavy duty ARP studs and no mods necessary, just how big a rear wheel do you plan on running...?

The rear wheel is a 17x4.25 with a 160/60 tire

I plan on using either a 4.25X18  with a 160/60 or a 4.75x18 inch rear rim, I have a 750 here with a 4.5x17 inch rear rim on it and it fits the stock arm easily and works with a 10mm offset sprocket...
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #17 on: February 02, 2015, 03:41:24 PM »
In hindsight I kinda wish I went with a 18" wheel instead of the 17" but whats done is done. I'll get her all put together the way it is and if later down the road I want to make the investment in a larger wheel then I'll go ahead and do it. My front offset sprocket is 9.5mm out and same with my rear spacer.

Offline seanbarney41

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #18 on: February 02, 2015, 04:50:45 PM »
Cyclex has 10mm offset front and rear sprockets...that would save all the hassle with the rear spacer and studs.

Go to the bottom of the page.
http://cyclexchange.net/Chain%20Sprocket%20Page.htm
If it works good, it looks good...

Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #19 on: February 02, 2015, 06:49:02 PM »
Cyclex has 10mm offset front and rear sprockets...that would save all the hassle with the rear spacer and studs.

Go to the bottom of the page.
http://cyclexchange.net/Chain%20Sprocket%20Page.htm

I don't understand how that would help..I already have the offset front sprocket and my rear sprocket is already being moved 9.5mm and there isn't enough room on the stud to bolt it down. The same would be the case if I bought a combined unit.

Can anyone validate what KRONUS0100 said about being able to hammer these studs out? I showed them to a few guys at work and they said that the stud was probably double threaded, meaning they would have to be screwed out (which is damn near impossible..tried it with my vice grips and stripped the stud to hell  ???)
« Last Edit: February 02, 2015, 06:51:06 PM by Foyil100 »

Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #20 on: February 02, 2015, 07:00:49 PM »
The CyceX sprocket has the stock flange thickness where the stock studs attach, but then have the sprockets offset.
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #21 on: February 02, 2015, 07:03:25 PM »
The CyceX sprocket has the stock flange thickness where the stock studs attach, but then have the sprockets offset.

Ah I see..damn..wish I wouldn't have stripped that stud about 30 min ago haha I would of rather spend the extra $50 on the new sprocket rather than going the route of getting these f'ing studs out!

Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #22 on: February 02, 2015, 07:12:03 PM »
Look up at seanbarney's link- he posted this to you hours ago.

A word of wisdom, if someone takes the time to link a product or project thread where they reference your dilemma, pays to give it a read and not reject it because you don't understand the relevance at the time. Lots of very experienced folks here and they've seen it all at least twice before. No sense reinventing the wheel when they're being gracious with their knowledge to help you out.

Now, to get the rest of those studs out...  :o
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #23 on: February 02, 2015, 07:15:27 PM »
Look up at seanbarney's link- he posted this to you hours ago.

A word of wisdom, if someone takes the time to link a product or project thread where they reference your dilemma, pays to give it a read and not reject it because you don't understand the relevance at the time. Lots of very experienced folks here and they've seen it all at least twice before. No sense reinventing the wheel when they're being gracious with their knowledge to help you out.

Now, to get the rest of those studs out...  :o

Yes I definitely should have waited, without a doubt you are correct. However, all hope is not lost :).. I just cranked the nut back onto the stud and it reset the threads on that one stud where I tried to remove it. That being so, I think I can go ahead and order the cyclexchange rear sprocket and call it a night!....right? ;)

Offline Retro Rocket

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #24 on: February 02, 2015, 07:16:05 PM »
Look up at seanbarney's link- he posted this to you hours ago.

A word of wisdom, if someone takes the time to link a product or project thread where they reference your dilemma, pays to give it a read and not reject it because you don't understand the relevance at the time. Lots of very experienced folks here and they've seen it all at least twice before. No sense reinventing the wheel when they're being gracious with their knowledge to help you out.

Now, to get the rest of those studs out...  :o

This ^^, I sorted this out 10 or so years ago on Honda 4's, been fitting bigger wheels to Jap bikes since the 1980's..... Not bad for an "old man" eh.... ;D ;)
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Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #25 on: February 02, 2015, 07:18:17 PM »
All's good, Foyil. We can't learn when we don't make mistakes. Afterwards, it's called "experience". Get to Retro's age, and hell, you'll be experienced too  ;)

He's so experienced, his first job after school was welding watertight doors on the Titanic. He knows better now.
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #26 on: February 02, 2015, 07:19:58 PM »
Haha well you all remember what it was like being young and foolish right?  ;D (PS I'm 27) You've gotta learn somehow! That being said, this forum has been invaluable to me in finding the info I need!

Offline Retro Rocket

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #27 on: February 02, 2015, 07:25:23 PM »
Just trying to save you some grief mate... ;D ;)
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Offline Foyil100

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #28 on: February 02, 2015, 07:54:56 PM »
Just trying to save you some grief mate... ;D ;)

Much appreciated Retro & Calj!

Okay, so now where I'm at..The most grief-free route would be to spend the $50 and order a new rear sprocket from cyclexchange. However, that cyclexchange rear sprocket has a 10mm offset and my current front sprocket has a 9.5mm (3/8") offset, will this pose a problem? As I'm writing this I just noticed the offset front sprocket on cyclexchange is also 3/8" so I think I just answered my own question.

Offline calj737

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Re: Is it possible to remove hub bolts? custom 76' CB750F
« Reply #29 on: February 03, 2015, 04:26:02 AM »
That's experience talking already!  :D
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