Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Stevo on October 20, 2023, 04:47:36 PM

Title: locking petrol cap
Post by: Stevo on October 20, 2023, 04:47:36 PM
Hello Peeps,
I am looking for help with finding a key for my 1975 cb400f super sport petrol cap, it looks like it would be some kind of hollow hex key, the tank is standard and the lock looks like a standard fitmentbut no one seems familiar with it, not even David Silver ? !
Can any of you guys shed any light on this please ?
Cheers everybody.
Steve.
PS. I will post some pics if needed.
Title: Re: locking petrol cap
Post by: Matt_Harrington on October 20, 2023, 05:10:19 PM
A pic would be useful
Title: Re: locking petrol cap
Post by: Oddjob on October 20, 2023, 06:19:48 PM
Answered on other thread.
Title: Re: locking petrol cap
Post by: Bryanj on October 20, 2023, 07:46:50 PM
Not Honda
Title: Re: locking petrol cap
Post by: Oddjob on October 20, 2023, 08:40:18 PM
This is almost certainly what you have.

(https://i.postimg.cc/zBqF13RB/IMG-3431.jpg) (https://postimg.cc/8Fn6Rp4Q)

(https://i.postimg.cc/7h61fc9r/IMG-3432.jpg) (https://postimg.cc/9R6wkLsL)

And what the keys look like.

(https://i.postimg.cc/Qd5Q9cQC/IMG-3433.jpg) (https://postimg.cc/K1GkCksh)

I did have a genuine Honda NOS tank lock for the 400. The lock comes with a long screw which screws into a plate on the other side of the lock after passing through the tank loops

(https://i.postimg.cc/mgFwYvsb/IMG-3430.jpg) (https://postimg.cc/3kYm7bN6)
Title: Re: locking petrol cap
Post by: Stevo on October 20, 2023, 09:01:40 PM
Yes thats it,
where can I get a key dear chap ?
Cheers
Title: Re: locking petrol cap
Post by: Oddjob on October 20, 2023, 09:20:41 PM
No offense Stevo but nowhere. No one sells these anymore. I have no idea why I have a new one myself, I did have the same lock on my 500 tank many many years ago and I had a spare key on the key ring, if I still had that key ring you'd be welcome to the key but I haven't seen that since the 80s.

You can either try and find a new one and you'd get 2 keys with that or remove and fit the proper lock like this.

https://www.cmsnl.com/products/check-assy-cap_17550377305/
Title: Re: locking petrol cap
Post by: Laverda Dave on October 21, 2023, 04:38:26 AM
The lock on my original 400/4 will open with any key!
Title: Re: locking petrol cap
Post by: Orcade-Ian on October 21, 2023, 07:58:15 AM
Ah!
Now I see! From you description I was working the other way round!  Will a 1/4" drive 6 sided socket fit down the hole?  No scale evident, so not sure what size. You could always turn or grind down the o/d and stick it on the end of a short extension bar.

Ian
Title: Re: locking petrol cap
Post by: McCabe-Thiele (Ted) on October 21, 2023, 08:24:34 AM
The lock on my original 400/4 will open with any key!

Mine is the same just takes the end of the key to work.
Title: Re: locking petrol cap
Post by: AshimotoK0 on October 21, 2023, 09:00:43 AM
If you find the A/F size of the Hex can't you modify a driver like in this link or a 1/4" drive socket. I would chop off the head and cut a slot in one end and braze part of and old key to it. May need the O.D machining down though. Bit of a faff but just a suggestion of what I would do.
If you did do it and it needs lathe or brazing just send me the bits and I will do it for you. You could even use an old Honda key for the handle, which would make it rather cool.

https://www.ebay.co.uk/itm/304687738310
Title: Re: locking petrol cap
Post by: Laverdaroo on October 21, 2023, 09:56:37 AM
I'm sure a decent clock restorer would be able to help, at a push being able to make you one but may be cheaper to just buy a new lock if not.
Title: Re: locking petrol cap
Post by: Matt_Harrington on October 21, 2023, 02:15:16 PM
The lock on my original 400/4 will open with any key!
Same here! 
Title: Re: locking petrol cap
Post by: Stevo on October 21, 2023, 05:37:25 PM
Hey ,
thanks you guys, what a lovely bunch you all are, very kind and helpful.
I really appreciate your comments, I will probably machine down a hex socket and tack a washer on the end .
Thanks again for taking the effort to help.
Cheers.
Steve.
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