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RJBSA1949
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Fork Tube Puller a la Gunk #54043
05/03/07 2:08 am
05/03/07 2:08 am
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
BSACafe Offline OP
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BSACafe  Offline OP
BritBike Forum member
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
I was in the garage tonight installing some new steering bearings, and when it came time to install the forks, I was dreading it. Last time I did it, I used a broom stick with some tape to make it tight. What a pain.

Then I remembered Gunk suggested a bolt with some rubber washers. I've got lots of stuff in my garage, so I found a 10" bolt, four garden hose washers, two flat washers, one lock washer and two nuts....and voila...I've got a BSA fork tube puller a la Gunk. The garden hose washers are the perfect size, and with three turns of the nut, the washers expanded enough to haul the forks through and tighten them with the bottom tree. Who can ask for anything more????

Gunk...thanks for saving me countless hours of mental pain and frustration....I owe you a beer or two.

Cheers beerchug


Jer

http://www.caferacer.ca

1968 BSA Lightning Cafe
1968 BSA Thunderbolt
1969 BSA Royal Star
1972 BSA Thunderbolt
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Re: Fork Tube Puller a la Gunk #54044
05/04/07 2:30 pm
05/04/07 2:30 pm
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
BSACafe Offline OP
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BSACafe  Offline OP
BritBike Forum member
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
Here's a picture of the simple tool (thanks Gunk), that saved me hours of frustration. Hope it helps someone else as much as it did me.



Jer

http://www.caferacer.ca

1968 BSA Lightning Cafe
1968 BSA Thunderbolt
1969 BSA Royal Star
1972 BSA Thunderbolt
Re: Fork Tube Puller a la Gunk #54045
05/04/07 2:49 pm
05/04/07 2:49 pm
Joined: Apr 2006
Posts: 417
Toronto, Canada
BruceinT.O. Offline
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BruceinT.O.  Offline
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Joined: Apr 2006
Posts: 417
Toronto, Canada
I may need to borrow that soon. I just got my fork tubes (for the second Firebird) in the mail this week. Spreading myself too thin again.


Bruce

1968 Triumph Trophy
Re: Fork Tube Puller a la Gunk #54046
05/04/07 3:02 pm
05/04/07 3:02 pm
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
BSACafe Offline OP
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BSACafe  Offline OP
BritBike Forum member
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
No problemo...you can pick it up when you grab the side covers.


Jer

http://www.caferacer.ca

1968 BSA Lightning Cafe
1968 BSA Thunderbolt
1969 BSA Royal Star
1972 BSA Thunderbolt
Re: Fork Tube Puller a la Gunk #54047
05/04/07 4:30 pm
05/04/07 4:30 pm
Joined: Apr 2006
Posts: 1,708
Virginia, USA
SBoyd Offline
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SBoyd  Offline
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Joined: Apr 2006
Posts: 1,708
Virginia, USA
Help.
I enjoy posts like this but......what does it do?????
I just put new fork seals in my T140. Also just put new steering head bearings in my 441BSA (with CZ motocross forks) and did not seem to lack anything like this that would help. Thanks


Stop the insanity.
Re: Fork Tube Puller a la Gunk #54048
05/04/07 4:53 pm
05/04/07 4:53 pm
Joined: Jan 2005
Posts: 165
Canada
J
jackd Offline
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jackd  Offline
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J
Joined: Jan 2005
Posts: 165
Canada
I made a tool for pulling my fork tubes in with the fork stem of an old ten-speed bike. I got a foot and a half of ready-rod and attached it to an old stem that I found. The bike stem (what holds the handle bars to the forks) has a wedge shaped bottom nut which spreads when you tighten the top bolt. I just slid it down as far as I wanted into my Triumph fork tubes and tightened the top bolt and wound a nut down down on the ready rod - effectively a puller. Jackd

Re: Fork Tube Puller a la Gunk #54049
05/04/07 5:11 pm
05/04/07 5:11 pm
Joined: Apr 2006
Posts: 417
Toronto, Canada
BruceinT.O. Offline
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BruceinT.O.  Offline
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Joined: Apr 2006
Posts: 417
Toronto, Canada
Jack
That is brilliant!! I got one of those too.
Poverty is the mother of invention.


Bruce

1968 Triumph Trophy
Re: Fork Tube Puller a la Gunk #54050
05/04/07 5:14 pm
05/04/07 5:14 pm
Joined: Jun 2004
Posts: 1,115
Kansas
kboyd Offline
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kboyd  Offline
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Joined: Jun 2004
Posts: 1,115
Kansas
I've been working on my old Ceriani rr forks for the flattracker and having hell....

So is this tool to pull the fork tubes up into the trees? The Tri forks have the tapered top on the fork tube. I'm having trouble sliding my Ceriani fork tube up through the triple clamp on one side (not tapered) and I'm wondering if something like this would help.

Do you compress the nut on the long bolt until the washers squish out and jam into the fork tube threads, then pull it up thought the triple? Sounds reasonable...

I swear that doing the old seals on these Cerianis was one of the hardest things I've had to do on an old bike... Galled in for 30 years..UGH!

Kyle


Kyle#44x

1969 T100R Daytona
1979 Powroll Honda XR250 "Dallas Baker" flattracker
1975 XL350 project bike
Re: Fork Tube Puller a la Gunk #54051
05/04/07 5:21 pm
05/04/07 5:21 pm
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
BSACafe Offline OP
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BSACafe  Offline OP
BritBike Forum member
Joined: Feb 2006
Posts: 307
Saint John, New Brunswick
Quote:
So is this tool to pull the fork tubes up into the trees?
That's absolutely it. I don't know if they will help with non tapered forks, but I don't see why not.

Quote:
Do you compress the nut on the long bolt until the washers squish out and jam into the fork tube threads, then pull it up thought the triple?
Yes...and the garden hose washers use are a tight fit, so with three turns of the nut, it squished the rubber washers enough to easily pull the tubes through.


Jer

http://www.caferacer.ca

1968 BSA Lightning Cafe
1968 BSA Thunderbolt
1969 BSA Royal Star
1972 BSA Thunderbolt
Re: Fork Tube Puller a la Gunk #54052
05/04/07 5:27 pm
05/04/07 5:27 pm
Joined: Jan 2005
Posts: 165
Canada
J
jackd Offline
BritBike Forum member
jackd  Offline
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J
Joined: Jan 2005
Posts: 165
Canada
That's exactly how both of these pullers work. I was fighting against my fork springs so I went with the ready-rod, instead of the smooth shaft that Gunk has. His puller, in my opinion would require a very strong man to overcome the resistance that the fork tubes have as they enter the fork clamps - possibly a two man job. My puller made it a one man job and you could overcome any mechanical resistance easily. My bike is gone but I still have the puller. Keep it for the next project. Jackd

Re: Fork Tube Puller a la Gunk #54053
05/04/07 6:28 pm
05/04/07 6:28 pm
Joined: Nov 2006
Posts: 176
Dillsburg, PA - USA
mattstriumph Offline
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Posts: 176
Dillsburg, PA - USA
Nothing like making your own tools. This is definitely a good one.



1965 Triumph T100SR
Re: Fork Tube Puller a la Gunk #54054
05/04/07 6:36 pm
05/04/07 6:36 pm
Joined: Mar 2006
Posts: 1,011
43.34 (4320') | -79.81 (-794...
Gunk Offline
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Gunk  Offline
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Joined: Mar 2006
Posts: 1,011
43.34 (4320') | -79.81 (-794...
Yer welcome Jer.
Glad it helped out.
As far as requiring two persons to install, it is just as easy as this.

Install the tool
Feed the end of the tool up through the triple tree.
Give it a sharp yank.
Bob's yer uncle.

Install forks in a second.

Glad about the hose washer mod Jer, I was concerned not everyone would have easy access to the shock bushing.

Gunk


"he who laughs fast, laughs first"~Gunk
Re: Fork Tube Puller a la Gunk #54055
05/04/07 6:44 pm
05/04/07 6:44 pm
Joined: Apr 2006
Posts: 1,708
Virginia, USA
SBoyd Offline
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SBoyd  Offline
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Joined: Apr 2006
Posts: 1,708
Virginia, USA
Kyle
the tool is of benefit when working with forks with external springs (finally figured that out)
The Cerianis don't need it. You need to remove the clamping bolts from your triple-trees and spread them as much as possible w/o damage. (large screwdrivers from the bottom). the tubes should then slide in with little effort unless something is bent (very common on old flat track stuff)

If they don't slide fairly easily, it is best to find out why and make it so (say, by honing the clamps) because you will want to make adjustments at the track (sliding the tubes up or down to adjust trail, and straightening after a crash.


Stop the insanity.
Re: Fork Tube Puller a la Gunk #54056
05/04/07 7:53 pm
05/04/07 7:53 pm
Joined: Jun 2004
Posts: 1,115
Kansas
kboyd Offline
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kboyd  Offline
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Joined: Jun 2004
Posts: 1,115
Kansas
Right on, I may have to give it a try... I had to make two other tools just to do the seals, LOL! A flat tip screwdriver bent at 45 degress about 2" from the tip, then ground down a "step" on the tip, like a seal puller has. Then spent 3 hours and a gallon of sweat to pry the seals out. To put the new ones back in I used some thick walled aluminum conduit and a piece of pvc and my dead blow hammer to tap the new seals in...

SBoyd,
You are right about the old flattrack tubes. Small marks and waviness in spots, mainly up around the clamps. The fork travel area is pretty good still so I'll try to use them. There is a rough spot right up under the bottom clamp when it binds, but the other fork tube will slide up fairly easily. Maybe this tool will work for getting the other leg up where I want it, about 1/2" above the top clamp puts the geometry about right for 1/4 miles. I should sell them and buy some wide billet triples and have a set of xs650 forks gone over by Davey Durelle.

I finally got the motor figured out (bad porting job) and once I started riding it up and down the street the left fork leaked expensive 7W Bel-Ray all over my leg and beyond! Sucked to take the front end off for a few days worth of fork work... but it rained every day anywho... LOL!

Kyle


Kyle#44x

1969 T100R Daytona
1979 Powroll Honda XR250 "Dallas Baker" flattracker
1975 XL350 project bike
Re: Fork Tube Puller a la Gunk #54057
05/05/07 1:35 am
05/05/07 1:35 am
Joined: Nov 2004
Posts: 1,694
georgia
T
trumpetloon Offline
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T
Joined: Nov 2004
Posts: 1,694
georgia
Kyle... wrinkled tubes are bent. Best to replace now, instead of after the crash coming out of turn 4 on your way to a first victory!


1974 TR5T
Re: Fork Tube Puller a la Gunk #54058
05/05/07 1:43 am
05/05/07 1:43 am
Joined: Nov 2004
Posts: 1,694
georgia
T
trumpetloon Offline
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trumpetloon  Offline
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T
Joined: Nov 2004
Posts: 1,694
georgia
Multiple wavy wrinkles indicate repeated bend/straighten events... equals stress cracks! Be very careful if you decide to run these, and keep an eye out for larger fractures. eek


1974 TR5T
Re: Fork Tube Puller a la Gunk #54059
05/05/07 4:39 am
05/05/07 4:39 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
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Tiger  Offline
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Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Sounds like time for new tubes Kyle, a mate of mine up North makes them out of A106 seamless linepipe, top quality steel and the various schedules [wall thicknesses vs OD] makes the product very versatile.
No need to struggle with corroded seals ever again if you use these.
http://www.motohaus.com/html/seals/leakproof%20intro.htm
Gunk's tube puller is the product of a fertile mind, c'mon Gunk time to shuffle feet whilst staring down at same and muttering "Aw shucks, t'wern't nuthin" laugh


1969 TR6R
7.62 x 51 is not a maths puzzle.

Moderated by  Alan_nc 


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