https://www.yamahamotorcyclespares.co.uk/default.asp?uID=0

got it, part 13 and part 35

http://www.yamahamotorcyclespares.co.uk/spares/epc2.asp?modelID=9133&PageID=6&m=yamahadt125rintake&uid=0

That's it. you copy from other site,

13 is a gasket. & 35 air chamber,,,

35 is an air chamber and 13 is not a gasket its an air chamber as well and 13 fits into 9, but my question was are they really necessary as i couldnt really see what they do ?

13 is a 'boost bottle' leave it alone, no idea what the other is i've never seen on...treat with suspicion lol, but leave it alone

ok thanks for that and will put it back on when re-jetted carb

I was on wrong picture /model,,, I clicked first link,,,

ok, ordered a 250 main jet for my carb, while the top is off the carb would it be a good idea to lift the needle one notch or leave it as it is as this would make it run to rich ?

Leave it till you"ve tried it, if its rich it will 4stroke [, kinda splutter] at a steady throttle, the biggest damage that can occur when jetting is at W,O.T. on long staights, or hills,

ok will leave it alone for time being, out of interest what does W.O.T. mean ?

Wide Open Throttle

ok thanks

ok jet arrived today, all fitted and been for a test run, still pulls well and runs nice and clear after warming up so a good job all round and thanks for the help