I have found this interesting piece of racing parts at Yulite in Sentul. This one is racing reed valve assy for the Yamaha 125Z by KIKUKU. Yeah, the name is funny but when I ask the shopkeeper, he said that many racer use this part. Anyway, this thing is not plug and play since it need a little bit more of shaving before can be fitted nicely to the bike. The stock reed valve cage is made from rubber plastic whereby this one is made from aluminium.
KIKUKU Racing Reed Valve Assy is priced at RM70.