Smiths speedometer gearbox, part number BG5330/287, suitable for a wide range of classic British motorcycles. This is the right-hand drive variant with a 2:1 ratio and 5/8" spindle bore, as originally fitted to many Triumph, BSA, Norton, AJS, and Matchless models from the 1960s–70s.

🔧 Specifications:

• Part Number: BG5330/287 (also cross-referenced as 99-9976, 19-9205, D373, 02-4448)

• Drive Ratio: 2:1 (two cable revolutions per wheel revolution)

• Axle Size: 5/8" 

• Drive Side: Right-hand (RH)

• Cable Entry: Standard Smiths square drive

✅ Compatibility Includes:

• Triumph: 3TA, 5TA, T100 (1964–73), T120/TR6 (1964–67)

• BSA: C15, B44, A50, A65 (check axle size)

• Norton: Dominator, ES2, Model 88/99

• AJS / Matchless: Heavyweight singles and twins

Please verify spindle size and drive side before purchase.

✅ Returns & Customer Satisfaction:

We operate a no-quibble exchange or refund policy. Customer satisfaction and positive feedback are paramount to our business.

If you’re not happy with your purchase, simply return it in original condition and we’ll refund or exchange—no fuss.

⚠️ Note: If this item is purchased for a non-compatible application and returned, postage costs will be deducted from the refund.

 

🏍️ About Timeless Motorcycles:

Based in Mansfield Woodhouse, Nottinghamshire, we specialise in the refurbishment, repair, and servicing of Smiths Chronometric & Magnetic Speedometers & Tachometers. Trusted by restorers worldwide, we’re proud to support the preservation of classic British instrumentation.