D Drake New member Apr 8, 2011 #1 my xr100 has a bbr 120cc kit on it, the valves and cylinder head are stock. I know that compression ratio is volume @ BDC/ volume @ TDC. the stroke is 45mm and the bore is 58mm. i need to figure out what the clearence volume is. does anyone know?
my xr100 has a bbr 120cc kit on it, the valves and cylinder head are stock. I know that compression ratio is volume @ BDC/ volume @ TDC. the stroke is 45mm and the bore is 58mm. i need to figure out what the clearence volume is. does anyone know?
