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1980 Kdx 250 fuel cap

Posted: 05:56 pm Feb 11 2026
by Dunderheed
Hi
I have a 1980 Kdx250 and i am trying to source a petrol cap and not having any joy .Its Approx 64 mm dia.Has anybody had any luck finding one or an aftermarket one that fits.I see Accerbis do a cap that is approx 65.9 but not sure if that can only be fiited to an Accerbis tank

Re: 1980 Kdx 250 fuel cap

Posted: 07:14 pm Feb 11 2026
by KDXGarage
Hi. Welcome to kdxrider.net. In the USA, here is what a 1980 KDX250 fuel tank cap fits:

Kawasaki part number:

51049-1060

1979
KDX400

1980
KDX175
KDX250
KDX400

1981
KDX175
KDX250
KDX420

1982
KDX175
KDX250
KDX450

Re: 1980 Kdx 250 fuel cap

Posted: 08:24 pm Feb 11 2026
by billie_morini

Re: 1980 Kdx 250 fuel cap

Posted: 10:29 pm Feb 11 2026
by JimmyB
They also used that cap part number 51049-1060 as KDXGarage listed on the 84-85 Tecate 3 2 stroke trike ATV, part # 51049-4002 also fits but unfortunately discontinued also, possibly one of the ATVs close to that year may also use a cap that thread size but was a slightly different design.

Is 64mm the measurement you gave the thread size? I think the 83-88 KDX had a bigger filler neck, possibly that model might fit??