Tech specs as at end of season 30 April 2013

Excalibur, Triumph Bonneville '73 nostalgia dragbike specs.
Frame: Chromoly 1" dia x .050" wall thickness, tig welded.
Forks: Modified FXR150, 33mm stanchions, shortened
Front wheel: KDX200 hub & disc with spoked 18" WM2 alloy rim
Rear wheel: WR250 hub & disc with spoked 18" WM3 alloy rim
Tires: Front 90/90-18" Pirelli, Rear 18"x4" M&H Drag slick.
Bodywork: Rear guard/seat is carbon fibre, bullet-nose is alloy
Brake calipers: Nissin motocross, single acting.
Bore & stroke: 77.5mm x 82mm (773cc), de-finned T140 barrels
Compression: approx. 9.9:1
Carbs: Amal mk2, 30mm, 600 mains
Fuel: Methanol, 600ml tank capacity
Oils: Motor; castrol R (450ml), Gearbox; ATF (500ml)
Oil pump: Stock 650/750
Valve gear: Stock valves & springs with lightened rockers.
Pistons: Stock Hepolite 8.5:1 +.060", balanced
Exhaust: 1.5 inch O.D., 37.5 inch long
Crank: Stock T140 with flywheel
Conrods: Stock T140, balanced
Crankcases: Stock 1973, RH gearshift, matched pair.
Primary drive: Duplex chain, 650 T120.
Clutch: Hyde 7plate, dry.
Clutch locker: Adapted Banshee, 6 arm.
Gearbox: Stock 5 speed B series, lightened selectors
Cams: Inlet; Stock T140, Exhaust; stock T120, stock T140 camwheels
Camfollowers: inlet; 3/4"radius, exhaust; R radius.
Ignition: Microsquirt programmable control.
Coil: 3ohm green dyna twin output, suppressor HT leads.
Battery: 16v Lithium Polymer, 1000 mAh
Gearing: 4.63:1 overall
Weight: Bike: 99kg (217 lb)wet
Weight bike with rider & gear: 163kg (358.6 lb)
H.P. 69.6hp according to online 1/4mile calculators
Best E.T. 10.98, recorded at March 2013 NZ Nats, 1/4mile
Best MPH 118.9mph recorded at March 2013 NZ Nats, 1/4mile
Rider: Jamie Flavell, 56kg(123lb) plus 8kg riding gear.
Engine builder, design concept, technical detail: Pete Morrison
Frame and exhaust fabrication: Jamie Flavell
Pitcrew: Pete, Orb, Peter.
Sponsor: H.D. Cycles, Hamilton, N.Z.


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