As can be seen in the record books, the pre-unit 650 Triumph served well in several classes of land speed record racing, this bike most recently running in 650 APS-VG. Based on a 1953 engine and chassis, it was raced from new through 1958 by Bob Baumgartner. In the 1950’s it set records in 650cc and 750cc classes, semi-streamlined. It was also run more recently in 1997, 1998, 1999, 2001, 2002 in Vintage Gas class.
The solo seat and pillion and rear set foot-pegs allowed the rider to slide back, tuck in behind the fairing reducing wind resistance. With plenty of slow down room in land speed racing, a spool hub saves weight. The bike is in as-raced condition, is no trailer queen and reminds us just how hard on metals the Bonneville salt can be.
- Engine: Four-Stroke Twin, Pre-Unit
- Type: Overhead Valves, Two Valves per Cylinder
- Bore & Stroke: 71mm x 82mm
- Displacement: 649cc’s
- Compression Ratio: Unknown
- Carburetors: Amal Monoblocs
- Starting: Kick / Bump Start
- Horsepower: Unknown
- Primary: Chain Driven
- Clutch: Wet, Multi-Plate
- Final Drive: Chain
- Transmission: 4-Speed
- Frame: Single Loop, Lugged, Steel
- Suspension: Hydraulic Fork / Sprung Seat/Sprung Hub
- Brakes: No Front / 7″ Drum Rear
- Wheelbase: 54.5 Inches
- Wheels / Tires: 3.25 x 19 / 4.00 x 18
- Weight: 320 Pounds, Approximately
- Top Speed: 106 MPH
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Those are not Monobloc carbs . Looks like they were replace at some time with Concentric carbs.