D22 yd25 Thai built free wheeling hub spline count

[Navnoob]

as the use name says I am an absolute noob when it comes to navs just wondering if anyone has replaced there free wheel hubs and what the size was that fit just had a set of 83mm 27t and they are too small is there only 27t and 28t? Thanks in advance to anyone who has the time to answer I leave for a 2000km trip in 4 days and they need to be done ASAP