Steering Stem NutI have a big Bahco adjustable wrench with slim jaws. It doesn't usually take much to undo that nut. I have a couple of nuts that someone used a hammer and chisel on. I wouldn't recommend that..... :-)
http://www.ebay.co.uk/itm/Bahco-8-Slim- ... 231ef7a00a G '60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160 '66 Matchless 350 '67 CL77 '67 S90 '77 CB400F Steering Stem NutA 35mm socket fits fine and this size is cheap and readily available ( I got mine on Amazon ) I think its a standard car wheel nut size.
I got a real shock when I tried to remove the steering stem nut recently to restore my CB77. In the past I'd always used a large adjustable spanner to remove it as it doesn't have to be particularly tight. Mine just wouldn't move ( It had been standing in a garage for 30 years ) and fork disassembly came to a halt. I tried heat without effect. Since it's a sleeve nut when in place it's difficult to get access to apply penetrating oil so I plugged the opening for the steering damper, turned the forks upside down and filled the steering stem with penetrating oil from the bottom. Still wouldn't move after a week. Then I found a large ring spanner which was the right size and applied "impact torque" ( a large hammer! ), result destroyed spanner, nut unmoved. Then I bought the 35mm socket which I attached to a breezer bar I had for removing tight car wheel nuts, still no joy. Next up was a longer (75mm) breezer bar with plans for the addition of a scaffold pole. Thankfully the larger breezer bar did the trick. I think I remember LM posting once "if it's stuck you just need a bigger spanner! " Good Luck PhilD
Steering stem nutMy 16 stone offspring ( son ), every good toolbox should have one.
Just wanted to throw my two cents in since I battled that nut for several weeks. Another member told me that #4 Steering Lock Nut on the parts diagram needs to be held tight and turned right as you're wrenching left on the top nut. I just used a crescent wrench and channel lock pliers on the lower nut. Came off with ease!
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