Gunga Din is the nickname of a particular standard motorcycle built by the Vincent HRD company at their factory in Stevenage, Hertfordshire, England.

[5] The cast-off Rapide was extensively modified by Brown, working with his brother Cliff and with assistance from Vincent designer Phil Irving.

[4] Peter Gerrish, public relations officer for the VOC, found Gunga Din under some sacks in an out-building on the grounds.

[12][13] His instruction to Precision AR was to have the bike ready to appear at the Pebble Beach Concours d'Elegance in four months time.

Motorcycle broker and amateur Vincent historian Somer Hooker used Holdsworth's pictures to certify that the bike at Pebble Beach was Gunga Din.

[12] Ginga Din appeared at Cobble Beach on 13 September 2015 and won the Margaret Dunning "Spirit of Driving" Special Award.

[14] Gunga Din's Vincent V-twin engine displaced the same 998 cc (60.9 cu in) as the standard Rapide's, but during the course of its active life was upgraded and rebuilt numerous times, with the bike's specifications changing steadily.

[5] The earliest rounds of internal changes included enlarged ports, triple valve springs, polished connecting rods and engine case, a lightened flywheel, and a compression ratio that had been raised from 6.8:1 to 7.3:1.

[4] Gunga Din was originally equipped with the Brampton girder fork front suspension used on the Series B Rapides.

In 1948 Gunga Din set a new Standing Start Mile World Sidecar Record in Belgium with a speed of 94 mph (151.3 km/h).

A new Standing Start Mile record was set at Sandcar along with wins at the Invitation Race at Blandford, in the Unlimited class Sprint at Tartlepool and at the Shelsley Walsh hill climb.

Brown entered Gunga Din in the 1947 Isle of Man Clubman's Tourist Trophy (TT), where bike and rider managed to set fastest lap with a speed of 86.25 mph (138.81 km/h).

With registration number JRO 389 and in Black Shadow tune the bike challenged the Kilometre Lancée records for both solo and sidecar times.

In September of the same year Gunga Din returned to Belgium, but now with MkII cams, a 13:1 compression ratio, and two 32 mm Amal carburettors jetted to run on methanol.

[1]: 92 Gunga Din's final public appearance before being retired was in 1953 in Ireland, where it set a speed record of 143 mph (230 km/h).