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Author Topic: Questions about fork seals on a '78 CB750F  (Read 7404 times)

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Offline MCRider

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Re: Questions about fork seals on a '78 CB750F
« Reply #25 on: June 12, 2009, 11:40:14 AM »
Oh  I have one of those in my micrometer drawer.   ;D
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Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline nobrake

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Re: Questions about fork seals on a '78 CB750F
« Reply #26 on: June 12, 2009, 01:20:21 PM »
Quote from: 754 on June 12, 2009, 10:05:19 AM
You should ANNEAL the copper washers.



Huh? This technique before MJ got surgeries or after?
Enlighten us please.
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Offline MCRider

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Re: Questions about fork seals on a '78 CB750F
« Reply #27 on: June 12, 2009, 03:49:25 PM »
Quote from: nobrake on June 12, 2009, 01:20:21 PM
Quote from: 754 on June 12, 2009, 10:05:19 AM
You should ANNEAL the copper washers.



Huh? This technique before MJ got surgeries or after?
Enlighten us please.

It is as he says. You can refresh a used up copperwasher with the annealing process. Was done quite regularly back when mechanics actually did something rather than just R&R.
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Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline 754

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Re: Questions about fork seals on a '78 CB750F
« Reply #28 on: June 14, 2009, 10:03:20 AM »
Basically takes the crushed somewhat workhardened copper washer, back to its original, dead soft state.

gives it a new chance to do its job..


there is a few things about bike wrenching that are sorta cool.

 watching the washers turn red, then the puff of smoke when you quench is one.

 another is when you are pressing apart a crank, and the press loads up and then BANG ;D, the pin moves.. I know a bike tech that used to use my press to assemble/disassemble cranks, showed me the scribing tricks and more. I swear that guy probably got more enjoyment out of hearing the pin pop& jump, than almost anything else in life... :o

another is straightening a fork, leaving it in the blocks with dial indicator on it, then telling the customer to find 3 thou runout in it.. :D
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Kelowna B.C.       Canada

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73 836cc.. Green, had it for 3 decades!!
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Offline HavocTurbo

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Re: Questions about fork seals on a '78 CB750F
« Reply #29 on: June 14, 2009, 10:38:47 AM »
My favorite is watching customers jump when the bead seats on a mag rim. ;D
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'78 CB550K - Fokker CB.3
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Offline 754

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Re: Questions about fork seals on a '78 CB750F
« Reply #30 on: June 14, 2009, 10:52:25 AM »
Cleaning off the rim with schotchbrite or steel wool helps, and R-Glyde...

 but yeah they sure do snap sometimes.. I wouldnt want to go much over 60lbs on one either.

 do you remove the valve stem, to get max air in quickly, it helps.
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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...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline HavocTurbo

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Re: Questions about fork seals on a '78 CB750F
« Reply #31 on: June 14, 2009, 11:39:24 AM »
Quote from: 754 on June 14, 2009, 10:52:25 AM
Cleaning off the rim with schotchbrite or steel wool helps, and R-Glyde...

 but yeah they sure do snap sometimes.. I wouldnt want to go much over 60lbs on one either.

 do you remove the valve stem, to get max air in quickly, it helps.

I use the green biscuits on an angle drill or angle die grinder. Seems to work ok if you aren't too forceful.

Standard dishsoap and water acts as double duty for lube and leak detect.

Oh you should always pull the valve stem out. Makes a louder pop that way.  ;D
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'48 HD Panhead - Exxon Valdez
'78 CB550K - Fokker CB.3
'78 Honda CB750K - Mavrik
'80 Yamaha XS850G - Kanibalistik
09 XL883L - No Name
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