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CB350/400
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Front fork problem
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Topic: Front fork problem (Read 9815 times)
Greg65
SOHC Member
Posts: 214
Front fork problem
«
on:
October 22, 2014, 11:04:59 PM »
I am replacing the seals on the front forks. The first one has come apart fine however ( there is always a however) the second is sulking. The bottom socket bolt, oil lock piece and under seat pipe are all rotating! So how do I hold the internal gubbins still while I undo the socket bolt. Thanks in advance for your wise words.
Greg
Logged
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978
Bryanj
Grogu
Posts: 12561
Re: Front fork problem
«
Reply #1 on:
October 23, 2014, 08:46:09 AM »
Put the fork back together with spring and top nut the hold fork upside down and push down on slider to compress spring
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Clem2112
Midlife
SOHC Expert
Posts: 282
CB400F1 1976 R1200GS 2016 Matchless G80 1955
Re: Front fork problem
«
Reply #2 on:
October 23, 2014, 09:08:32 AM »
Second that... you need friction to hold the inner damper rod still.
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steven400/4
SOHC Expert
Posts: 313
Re: Front fork problem
«
Reply #3 on:
October 23, 2014, 09:25:46 AM »
or use the speed of an air gun that worked on mine
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cb400f2 x7
honda ss 50
gsx 1400
matthewmosse
SOHC Master
Posts: 2161
Re: Front fork problem
«
Reply #4 on:
October 23, 2014, 11:20:40 AM »
Sharpen a broom handle like a pensil and bang it in with a hammer can work too.
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Got a 500/4 with rust and a sidecar and loadsa bits. nice and original and been round the clock
MikeM
SOHC Expert
Posts: 272
Re: Front fork problem
«
Reply #5 on:
October 23, 2014, 11:59:50 AM »
the way I got mine off was wrap fork in a towel put it in a workmate or the like and use an allen key on a socket,
one like this
http://www.ebay.co.uk/itm/Signet-6mm-Allan-key-socket-3-8-drive-/251681322950?pt=LH_DefaultDomain_3&hash=item3a996037c6
did not use a lot of pressure , more of a snap action to break the seal
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Greg65
SOHC Member
Posts: 214
Re: Front fork problem
«
Reply #6 on:
October 23, 2014, 04:45:29 PM »
Thanks for all the advice. First up tried the reassembly and spring compression method, no joy. So picked up the offending fork and walked down the road to my local garage. Air gun worked a treat. If I had known would have gone there with both in the first place.
Now a quick question for the assembly. The workshop manual mentions a " liquid sealant" on the threads of the socket bolt prior to assembling. Any particular type?
Cheers,
Greg
Logged
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978
Lynx
Repair & Despair Under One Roof
SOHC Expert
Posts: 401
Re: Front fork problem
«
Reply #7 on:
October 23, 2014, 05:34:49 PM »
Hi Greg,
I'm surprised they say use a sealant. I never have. there should be a copper washer under each Allen bolt. This should seal fine. You could use some of the dreaded silicone gasket but just a smear. I wouldn't use locktight and you will have trouble getting them apart again should you or anyone else ever need to.
Logged
Yamaha RD500LC
Triumph Speed Triple RS.
Previous bikes include
1976 Honda CB400F Now sold :-(
CB350K3 x2
CB250G5
CX500C
VF500F2
VF1000FE
hairygit
SOHC Jedi
Posts: 2708
Re: Front fork problem
«
Reply #8 on:
October 23, 2014, 05:55:50 PM »
I have seen threadlock mentioned in the cycleserve manual, presumably to prevent the bolt working loose in service, think about it, if the bolt came loose, what is holding your fork leg together, frankly, nothing. I bought a pair of n.o.s. fork legs from D.S.S. About 20 odd years ago, and one of the seals leaked, so took them apart to renew them, and there was some kind of sealant/thread locking compound on the factiry fitted bolts. So I used some loctite thread lock on rebuilding, and had no problems dismantling them to do the seals again 10 years ago. It's up to you, but I would certainly go for a thread locking compound.
Sent from my GT-S5839i using Tapatalk 2
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If it's got tits or wheels, it's hassle, if it's got both, RUN!!!
Greg65
SOHC Member
Posts: 214
Re: Front fork problem
«
Reply #9 on:
October 24, 2014, 08:18:29 AM »
There was some sort of sealant/thread lock present around the lock bolt when I dismantled them. I have heat treated the copper washers so will see how that goes.
Logged
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978
hairygit
SOHC Jedi
Posts: 2708
Re: Front fork problem
«
Reply #10 on:
October 24, 2014, 09:24:33 AM »
Your bike, your choice, but if Honda specify sealant/locking compound, they do it for a reason!???
Sent from my GT-S5839i using Tapatalk 2
Logged
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!
Bryanj
Grogu
Posts: 12561
Re: Front fork problem
«
Reply #11 on:
October 24, 2014, 09:29:24 AM »
Done loads, never ever used threadlock but sometimes new washers
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Trigger
Grogu
Posts: 8379
Engines built on reputation, not advertising.
Re: Front fork problem
«
Reply #12 on:
October 24, 2014, 09:33:49 AM »
Same as Bryan, done shed loads over the years. Seen them with & without thread lock but, always build without.
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Lynx
Repair & Despair Under One Roof
SOHC Expert
Posts: 401
Re: Front fork problem
«
Reply #13 on:
October 24, 2014, 11:08:17 AM »
However. Always torque to specified torque.
Logged
Yamaha RD500LC
Triumph Speed Triple RS.
Previous bikes include
1976 Honda CB400F Now sold :-(
CB350K3 x2
CB250G5
CX500C
VF500F2
VF1000FE
Greg65
SOHC Member
Posts: 214
Re: Front fork problem
«
Reply #14 on:
October 24, 2014, 11:14:25 AM »
As the forks are penciled in for a rechrome and grind in the near future I will leave it out. Many thanks for all the wise words.
Greg
Logged
Keep smiling it makes the management nervous.
Honda CB400 1976
Suzuki GS1000 1978
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Front fork problem