Viton!
Oil-seal Krukas BSA DB & DBD GoldStar crankshaft seal 65-2505 VITON
Oil-seal Krukas BSA DB & DBD GoldStar crankshaft seal 65-2505
material = VITON!
you will maybe find cheap(er) BLACK seals from NBR elsewere, but nobody mentiones that the material of those is only heat resistant till +/- 100 °C (for shorter times)
Ours are from FKM / Viton (BROWN) material and therefore heat resistant + 200 °C even for long time's
with an aircooled engine and when racing/serious use, no luxery
BSA Part Number 65-2505
ONLY used in DB & DBD Gold Star (image 3) from factory on and use these with aftermarket crankshafts from Phil Pearson & N.E.B. (click)
We DO own and ride GoldStars ourselves..