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Tips
Tips

BN2 brake lines

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Nuthin', the seal is made with the flare.
 
As above there is no need for a pipe tape or other materials with flared brake lines....
 
If you are forming new flares on the brake lines, after you install the lines and snug everything up, the joints will all leak after you fill it up with brake fluid. That's because the new flares "deform" a bit to the mating surface of the wheel and master cylinder fittings. If you go around again you'll find them all a bit loose. Tighten them up again and all the leaks should disappear. Not too tight, just enough to stop the leaks. When I first replaced the lines on my BN-2 I was very careful forming the flares and, to say the least, I was quite surprised when everything leaked. But going around again with the proper brake fitting wrench (DO NOT USE ANYTHING ELSE!) fixed the leaks.
 
When I make flares, I'll check them for burrs and deformation. Maybe dress them with a fine file if they aren't up to snuff.
 
Always ensure that when making new brake pipes they are "double flared". I had all new brake pipes made for my 100 during the restoration and none leaked when I first used the brakes. Just lucky, I suppose?
 
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