hi jem...i have built 3 rg 250 gammas,1 for the track.i can send u a pic of the reed valve if you send me your email address.any questions please ask.let me know your problems.you can also try www.stanstephenstuning.com he is the best 2 stroke tuner in the country.give him a call he will advise you and provide any standard or performance parts..thanks dans 2 stroke tuning.