Moto&Parts-BBK&4VHead-PB04-B: YX4VHeadComp

☆. Description

YX 160/170cc 4 valve head Complete head ready to bolt on.
1 x Honda port 4 V head complete with 7mm lift cam and race springs Inlet valve 21mm x 2

Ex valve 18.5mm x 2 together with Honda Spark Plug ER9EH
Option 2 = 42mm