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PostPosted: Mon Dec 26, 2016 11:32 pm 
On the street
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Joined: Sun Dec 18, 2016 6:15 pm
Posts: 14
Location: Northern British Columbia
Country: Canada
Bikes owned: 72 GT750, 74 GT750, 75 T500, 09 DR650
Does anybody have any suggestions for fixing the pitting corrosion on the fork tubes to allow sliding the new seals on?

My GT750J forks are corroded immediately above the triple tree clamping points. These are the original fork tubes. You can see from the photos that the factory chrome ended just below the lower triple tree clamps. Is there a risk that this pitting will damage the new seal when it is slid into place? (I'm not too worried about compromised mechanical strength because the area above the clamp is a low stress part of the fork tubes.) If there's a risk of damaging the new seal, does anyone have a recommended fix?


File comment: Front fork disassembled
IMG_0995.JPG [ 146.87 KiB | Viewed 807 times ]
File comment: Pitting above the lower triple tree clamp point. This photo shows the extent for factory chrome.
IMG_0997.JPG [ 136.2 KiB | Viewed 807 times ]
PostPosted: Tue Dec 27, 2016 5:31 am 
AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1700
Location: Blythewood, SC, USA
Install the seals in the lower legs, and then install the upper tubes. The seal will never come in contact with that area at all.


If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........

PostPosted: Fri Jan 13, 2017 11:27 am 
Still in the Driveway

Joined: Sat Nov 12, 2016 1:17 pm
Posts: 6
Country: uk
Bikes owned: gt550 gt750 rg500 h2b z1 916 x7 sb200
Hi You can use a plastic bag or other thin plastic sheet. put the plastic in a cone shape at top off leg push seal on this and down tube
to where you need it. iv'e done this and it works well no damage
hope this helps

PostPosted: Sat Jan 14, 2017 8:00 am 
To the on ramp

Joined: Sat Jun 28, 2014 1:22 am
Posts: 220
Country: United Kingdom
Bikes owned: T500_MKIII
Wrap it in cling film / Saran wrap oil it and they'll slide over in harmed

PostPosted: Sun Sep 17, 2017 8:05 am 
Moto GP
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Joined: Fri Oct 24, 2008 5:55 pm
Posts: 3972
Location: Lancaster Pa.
Country: US
Bikes owned: GT750 x2 97 -1200 Bandit 86 GSXR1100
To make that pitted area look a bit better i wonder if some JB weld smoothed over that area and sanded smooth would hold ?

the older i get the faster i was

PostPosted: Sun Sep 17, 2017 9:18 am 
Moto GP
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Joined: Mon Dec 13, 2010 4:32 pm
Posts: 2919
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
+1 on using plastic. That’s what All Balls recommends.

BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
Yamaha 75 XS650
09 Triumph Bonneville SE

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