CB125K3 and Norton dominator fuel tank caps seized

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silverback
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Joined: Wed Dec 31, 2014 3:14 am

CB125K3 and Norton dominator fuel tank caps seized

Unread post by silverback » Fri Aug 26, 2016 8:32 am

Hi,

My father passed away a month ago and left us quite a few bikes to deal with one is a 1972 CB125K3 with only 4000 on the clock.I wanted to get it running because it needs to be sold along with all the others but I cannot get the fuel cap off I have sprayed wd40 underneath it as best I can.I know I can replace the cap cheaply but I don't want to damage the tank using too much force.

The 1956 Norton cap is also seized I am not going to attempt to get her running I don't have much knowledge of British bikes.Amazingly after all the years she has been standing nothing but the tank cap is seized.
Does anyone have any ideas what I could use to get the cap off? I thought of getting two pieces of wood and putting bolts through to join them together and clamping that round the cap to get leverage?

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mervin
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Re: CB125K3 and Norton dominator fuel tank caps seized

Unread post by mervin » Fri Aug 26, 2016 9:24 pm

have you tried a good firm tap with a rubber mallet , that may shock them into submission
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silverback
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Joined: Wed Dec 31, 2014 3:14 am

Re: CB125K3 and Norton dominator fuel tank caps seized

Unread post by silverback » Sun Aug 28, 2016 12:22 am

mervin wrote:have you tried a good firm tap with a rubber mallet , that may shock them into submission
Thanks for the reply.I got the 125 cap freed up I sprayed more wd40 on the Norton will have another try thanks for the suggestion.

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triumph5ta
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Re: CB125K3 and Norton dominator fuel tank caps seized

Unread post by triumph5ta » Wed Aug 31, 2016 2:20 pm

Remove the fuel tap and drain any old fuel out.
Leave the fuel tap out to give you a vent hole.
Now try heat on the cap but only in the form of hot water from a kettle sloshed over the fuel cap.
Not a flame obviously.
Then get hold of it with water pump pliers and turn it.
It probably needs a push and turn?
Protect the tank with an old towel or blanket.

DAVE M2
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Re: CB125K3 and Norton dominator fuel tank caps seized

Unread post by DAVE M2 » Fri Sep 02, 2016 3:06 pm

are you remembering to push down before turning?

sorry ......grandmothers and eggs

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