Royal Enfield 650 Twin breaks the land speed record

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The Mid Life Cycles Royal Enfield Interceptor 650 Salt Racer has smashed the class record at the annual Speed Week run at Lake Gairdner, South Australia.

With first-time salt racer Charlie Hallam in the driver’s seat, the Interceptor 650 Twin, nicknamed SABRE, broke the four-year-old class record on each of its runs, leaving the new mark at 212.514km/h.

The Interceptor 650 was entered in Class M-F 650, for 650cc un-streamlined streamlined motorcycles running commercial unleaded fuel.

The old record of 119.961mph was set at Lake Gairdner in 2016

For Mid Life Cycles, the trouble-free record passes by the Royal Enfield Interceptor 650 reinforced the confidence the team has in the Royal Enfield 650 Twin engine package and traditional twin-loop steel frame that was carried over from the road bike to the racer, with minimal modifications allowed under the class rules.

For the DLRA, Speed Week 2021 was a triumph, run with precision and good humour by a dedicated band who kept their enthusiasm alive through all of 2020 and the state border snap lockdowns of recent months.

ENGINE MODIFICATIONS:

  • Cylinder Head: Significantly modified in the combustion chamber and ports. Valves taken out to maximum Ø of insert – inlet 1.5mm o/s head with standard exhaust. Valves are HRA Custom 6.5mm stems.
  • Camshaft: Ground from HRA Competition Profile 1286 Racing Camshaft Master. Has 106.25° inlet lobe centre and 103.5° exhaust lobe centre.
  • Throttle Body: Radiused thru to butterfly. Resulting butterfly remains at 34mm. Behind butterfly, choke sections have enlarged to 34mm. Inlet manifold has been matched/ported to suit.
  • Pistons: 11:1 forged pistons with standard swept volume of 648cc.
  • Conrods: Polished and shot peened.
  • Crankshaft balanced and standard balancing counterweight removed.
  • Gearbox extensively modified to reduce friction.
  • Fuel: 98 RON Fuel blended with other compounds for performance.

CHASSIS MODIFICATIONS:

  • Ohlins Suspension
  • Modified and lightened alloy wheels
  • Pirelli Diablo Slicks front and rear
  • Custom swingarm lengthened by class-maximum 130mm
  • Custom-made front and rear sprockets, increasing gear ratio up to 40% from standard
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Sean Carroll

Since joining ManSpace magazine and thanks to the 'In the Drink' section, I've progressed from a strictly Carlton Draught/ VB drinker to a Carlton Draught/ VB drinker that occasionally tries some super weird fruity things. I think we can call that progress.

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