Speedo drive seems to be broken on my gsxr400 does any1 no if other models fit? I have a new cable and needle is fine. The drive isn't spinning the cable

I,ve found things from rg125 ,s from a similar year may fit

If you are talking for a gk76a part number 54600-32c02 the speedometere gearbox assembly that is on your front wheel. you can still get a new one from suzuki and they were also used on the 1994-96 RF600R and the 96-99 GSF600S.

I recently got one through Fowlers parts website (https://www.fowlersparts.co.uk/search/part/5460032C02)
It is expensive at £87.53 delivered being at RRP. i was tempted to go for an electronic dash for a few £££ more but though prefer to keep standard, + having a trade account can get it allot cheaper