I bought a fiddy but don't know what kind of head is on it. It has a two brothers 88cc s-stage kit. I thought the head was stock but it has a 20mm and 23mm valves. A stock head has 16mm and 19mm valves. Is it possibily from a 70? Does anyone have a stock head in good shape they wanna sell.

 

i would be willing to trade a stock head for yours depending on what kind yours is. pm me and send me some pics.

 

Why would you want to go stock?