Gearbox sprocket nut with oil seal BSA pre-unit swingarm models

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A new SRM product , this stainless steel gearbox sprocket nut with oil seal, will help reduce the oil weep from the gearbox mainshaft when the bike is standing on its side stand, a most annoying leak that affects many bikes.

Note it only fits BSA pre-unit swingarm models A7 A10 B31 B33 and Gold Star models gearbox.

Sorry does NOT fit any plunger or rigid models.

One sprocket nut with oil and lock tab washer is supplied, picture shows two nuts only for viewing the product.

Part Number:
6 × 6 × 1 cm
0.05 kg
Bike Model: 
A7 / A10
Pre-unit B31 B33 Gold Star
United Kingdom VAT Rates: 
GB Standard