Oh yes...1/2 a turn leaner on the idle mixture screw, needle clip position 1 notch from the top, my work is done! My son takes his cbt on Sunday, and i'm happy that this little bike is now ready for him to enjoy!
Thanks again everyone, esp Tora for your help. Without you guys i'd still be fiddling....
oh and i checked the engine ref. It is stamped SENDAH
It then has a number beginning with H
I did write down the number, but left it in the workshop. Doh!