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).
- Type: 90mm- Hub: Ø 25.4 mm (1 inch)- Switch-on speed: 1800 rpm.
Complete with mounting material and sprocket mount M24x1,5.Fits engines with a 25mm shaft (e.g., Honda GX270, GX340, GX390).