« previous next »
Pages: [1]   Go Down

Author Topic: CB750 Clutch lock nut size? Need to buy spanner tool (size?)  (Read 8976 times)

0 Members and 1 Guest are viewing this topic.

Offline VTCBike750

  • Hot Shot
  • ***
  • Posts: 743
CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« on: June 25, 2011, 02:09:50 PM »
Does anyone know the size of the spanner tool that I need to buy to remove the clutch lock nut.  Ive used a hammer and screw driver before, but figure Id just buy the tool. 20 mm, 22 mm, or 24 mm?

Id go look at the nut, but don't want to take things apart until I'm ready to work on everything.

Thanks guys

There's a cheap on on ebay:
http://cgi.ebay.com/ebaymotors/Clutch-plate-tool-Hub-Spanner-Nut-socket-90cc-110cc-ATV-_W0QQcmdZViewItemQQhashZitem3f0a8d6196QQitemZ270759977366QQptZMotorcyclesQ5fPartsQ5fAccessories
Logged
-Adam

1972 CB750 (current project)
http://forums.sohc4.net/index.php?topic=87951.0

Offline Spanner 1

  • Old Timer
  • ******
  • Posts: 4,092
  • CB 750 K0 ( always thought it was a K1!) + CB750K8
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #1 on: June 25, 2011, 02:42:20 PM »
What, someone call me ?
Logged
If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline Spanner 1

  • Old Timer
  • ******
  • Posts: 4,092
  • CB 750 K0 ( always thought it was a K1!) + CB750K8
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #2 on: June 25, 2011, 02:47:41 PM »
The Homda part # for the 750 clutch tool is;07086-30001, but I don't know what mm. Anyone else ?
Logged
If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline JohnG

  • Hot Shot
  • ***
  • Posts: 300
  • 1976 CB750F - original owner
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #3 on: June 25, 2011, 02:59:41 PM »
you can get a 3/8" drive tool made for the job (Honda clutch nuts)  and then get to use an air impact wrench for removing it (and installing).  This is far superior, IMO, to either hammer/screwdriver  or T-handle version, both of which I have done previously.
Logged
1976 CB750F - original owner
1971 CB450
1979 CB750F
1982 CB900F
1983 CB1123F - Rick Stetson motor

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,363
  • So, what do ya wanna talk about today?
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #4 on: June 25, 2011, 04:02:19 PM »
The clutch hub "Nut" is a special nut and it's round, not hex, so you can't just use a normal socket to remove it. Buy the tool, and do it properly. Cheers, Terry.  ;D
Logged
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline JohnG

  • Hot Shot
  • ***
  • Posts: 300
  • 1976 CB750F - original owner
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #5 on: June 25, 2011, 04:13:30 PM »
while you're buying stuff,  get a fresh nut  and a couple of the sheet metal tabs that go behind it  (although some schools of thought don't use them at all).

After thinking about it, I did work on a bike about a year ago where the nut was on so tight nothing but an air gun would get it off.  Hammer/screwdriver or T handle would not do it, no matter what.  Air wrench makes the job trivial.
Logged
1976 CB750F - original owner
1971 CB450
1979 CB750F
1982 CB900F
1983 CB1123F - Rick Stetson motor

Offline thep1pe

  • Enthusiast
  • **
  • Posts: 157
  • Proud Owner 76 CB550F1
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #6 on: June 25, 2011, 04:27:07 PM »
Just use some round bar/wire like coathanger stuff. Put it in the grooves on the round nut, then put a socket over it. I have done this many times and it worked every time. Made a tool eventually useing an old plug socket tube.
Logged

Offline VTCBike750

  • Hot Shot
  • ***
  • Posts: 743
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #7 on: June 25, 2011, 05:15:25 PM »
Quote from: Terry in Australia on June 25, 2011, 04:02:19 PM
The clutch hub "Nut" is a special nut and it's round, not hex, so you can't just use a normal socket to remove it. Buy the tool, and do it properly. Cheers, Terry.  ;D

Yes yes. Ive gotten if off before with a screw driver and hammer. This time I wanna buy the right tool, but dont know what size?

Quote from: JohnG on June 25, 2011, 04:13:30 PM
while you're buying stuff,  get a fresh nut  and a couple of the sheet metal tabs that go behind it  (although some schools of thought don't use them at all).

Sheet metal tabs? The one washer that locks into the nut?

Anyone know how much to tighten it down too?
Logged
-Adam

1972 CB750 (current project)
http://forums.sohc4.net/index.php?topic=87951.0

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,363
  • So, what do ya wanna talk about today?
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #8 on: June 25, 2011, 05:54:42 PM »
Quote from: VTCBike750 on June 25, 2011, 05:15:25 PM
Quote from: Terry in Australia on June 25, 2011, 04:02:19 PM
The clutch hub "Nut" is a special nut and it's round, not hex, so you can't just use a normal socket to remove it. Buy the tool, and do it properly. Cheers, Terry.  ;D

Yes yes. Ive gotten if off before with a screw driver and hammer. This time I wanna buy the right tool, but dont know what size?

Anyone know how much to tighten it down too?

That particular tool on EBay uses a 1/2" drive socket wrench mate. According to the factory workshop manual, the torque measurement for re-tightening it is 32.5 - 36.2 foot pounds. Cheers, Terry. ;D
Logged
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

76 k

  • Guest
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #9 on: June 25, 2011, 06:10:17 PM »
yeah, if i remember correctly, its only about 11 bucks and well worth it.
Logged

Offline VTCBike750

  • Hot Shot
  • ***
  • Posts: 743
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #10 on: June 26, 2011, 08:33:52 PM »


Anyone know how much to tighten it down too?
[/quote]
 According to the factory workshop manual, the torque measurement for re-tightening it is 32.5 - 36.2 foot pounds. Cheers, Terry. ;D
[/quote]

Does that seem like a lot?

Kind of like how the factory wants you to torque down the oil drain bolt to 25 lbs-ft in the shop manual.
Logged
-Adam

1972 CB750 (current project)
http://forums.sohc4.net/index.php?topic=87951.0

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,363
  • So, what do ya wanna talk about today?
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #11 on: June 27, 2011, 02:10:35 AM »
Yeah, well the book was written by the same guys who built your bike mate, so what are you gonna do? To be honest though I've never torqued a clutch nut in my life, I just tighten it up until I can't tighten it no more........... ;D
Logged
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline matt376

  • Full Member
  • *
  • Posts: 6
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #12 on: October 02, 2011, 12:13:24 PM »
VTC....  did you ever come across the proper size for the spanner??  I'm in the same boat.
Logged

Offline VTCBike750

  • Hot Shot
  • ***
  • Posts: 743
Re: CB750 Clutch lock nut size? Need to buy spanner tool (size?)
« Reply #13 on: October 02, 2011, 04:15:41 PM »
I ended up buying this one on ebay.
Very Happy

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270759977366&viewitem=&sspagename=ADME%3AL%3AOC%3AUS%3A1123

Z1 Enterprises also has one:
http://www.z1enterprises.com/Clutch-Hub-Nut-Socket-2161.aspx

Im pretty sure the 750 Clutch uses the 24 mm size.
« Last Edit: October 02, 2011, 04:20:28 PM by VTCBike750 »
Logged
-Adam

1972 CB750 (current project)
http://forums.sohc4.net/index.php?topic=87951.0
Pages: [1]   Go Up
« previous next »