1970 Triumph T120 Fork Leg Thoughts

| 2/11/2020 3:46:00 PM

Motorcycle Classics tech expert Keith Fellenstein
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Fork leg thoughts

Q: I am putting my 1970 Triumph T120 fork legs back together after some work on them. I want to make sure that they don’t leak where the dust covers mate with the lower legs (at the threaded junction). A friend said any good silicone sealer would work. Do you think Permatex High-Temp RTV Silicone Gasket Maker would be appropriate? I just happen to have some in my shop. I guess the issue is whether that would make it too hard to undo them down the road? I enjoy your column. Keep the rubber side down.

Crocker Bennett/via email

A: I too would be concerned about disassembling them the next time. If you go this route I’d only smear a little on a few threads, not the entire threaded portion. I wonder if Anti-Seize would work? It’s a heavy grease. Kill two birds with one stone perhaps?

2/27/2020 10:31:19 AM

I would use a product called Rectorseal #5. It's a "slow dry soft set" sealant. Fuel and oil resistant. I use it in places like this and it's great for threaded fuel taps. Probably easiest to find in a plumbing distributor. It won't take much on those fine threads!

2/27/2020 8:33:27 AM

I would think a product such as "EZ Turn lubricant/sealant" would be ideal for this application. It's used extensively in aircraft assemblies to prevent leaks yet allow easy disassembly.

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