Additional inner spring set (set = 2 pieces)
These valve springs are inserted into the original and strengthen them.These springs are suitable for engines which have been easily machined (e.g., RPM controllers removed).
Cylinder Head for Honda GX340, GX390:
- Extend and smooth the inlet and outlet channels- Increase compaction
For larger valves, the valve seats must also be expanded (Art No. 3502).
Reinforced aluminum push rod for Honda GX340 / 390.Length as original rod (165mm).
Note: A different guide plate (no.14791-ZK6-880) is required for this rod in the cylinder head!
When using the milled aluminum rocker arms (No. 1675), no sheet is required!
The New Gage Roller Rockers are now available. These rockers have a true roller tip and are manufactured out of high quality billet aluminum suitable for your high RPM GX390. Easy application and extremely durable.