Double B18/B20/B30 and B19/B21/B23/B200/B230
require special valve spring washer
And on the B19/B21/B23/B200/B230 a spec valve spring locator is needed
Length approx 57mm / Outer Diameter approx 32,2mm
NOTE: Measured including 3mm thick valve washer (SVF1323)
680N @ 44mm
830N @ 40mm
1000N @ 36mm
1220N @ 32mm
1400N @ 28mm
Coilbind 26mm including valve washer
Outer spring
Thread thickness approx. Ø4mm
Outer diameter approx. Ø32.2 mm
About 57mm high
Inner spring
Thread thickness approx. Ø2.7 mm
Outer diameter approx. Ø24mm
About 55mm high
on B18/B20/B30 required processing of the spring well.