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Makotosun

locking gas cap..missing key

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locking gas cap..missing key was created by ZEFER

So I have a fuel tank from a 74 DT-250-A it   a locking
any one have any sugesstions ? I am going to SH-can the old cap if or when i get it off and replace it with a non locking cap
30 Oct 2025 10:19 #1

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Replied by Gr8uncleal on topic locking gas cap..missing key

Have you tried the key for your ignition switch in it? I've just had a look at mine, as well as pictures online of a couple of others, and the lock isn't numbered. It must therefore be very basic, with any numbered key from a 1974 DT opening it (looks like that lock style was one year only). Or, if you are close to a locksmith, you could take the tank there and see if they have a key that fits it.
The following user(s) Liked this Post: MarkT, Ht1kid
30 Oct 2025 10:41 #2

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  • pabdt
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Replied by pabdt on topic locking gas cap..missing key

You must not have an ignition key? I have analyzed those locks and found that the fuel tank lock opens on the "base" part of the key. Tested and found, an UNCUT key will open the tank and is not locked as indicated in prev post.
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
1977 Yamaha DT250D
Next…196x-197x Yamaha something.
The following user(s) Liked this Post: Schu, Ht1kid
30 Oct 2025 12:51 #3

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Replied by Sneezles61 on topic locking gas cap..missing key

Maybe just my stuff, but a screwdriver works too.
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30 Oct 2025 17:40 #4

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