Titulo

The Spirit of Semtex

  Ottobre 1994

Spec sheet - Tech Stuff

Owner:...........................................Patrick Hook a.k.a. "Paddy" (heavily modified!)
Fabrication by:.............................................................Owner / Welbro Engineering
Chrome/Paint:....................................................................none - weighs too much


ENGINE

Builder:........................................................................................................Owner
Size/Type:.............................1232cc, short stroke, 4-valve, (was an Evo Big Twin)
Cases:........................................................................................Delkron, modified
Crank:.............................One-off S & S flywheels, modified and balanced by owner
Rods:...................................S & S Supreme Duty, bored out to take Cosworth pins
Pistons:............................Cosworth 90mm Formula One race car, heavily modified
Cylinders:................Stock, shortened, bored out, Beryllium Rings (no head gaskets)
Cam:...............................................................................................Fueling 4-valve
Carbs:....................2 x Weber IDF 40mm twin-throat racing, intakes by owner/Alan
Heads:...............................................................................4-valve Fueling, modified
Ignition:............................Interspan racing system, no external power supply needed
Air Cleaners:......................................................................................Pancake-type
Exhausts: ......................Titanium, computer calculated length, matched front and rear
Silencers: .........................................................................It'll make your ears bleed!


TRANSMISSION

Type:....................................................................................Four speed wide-ratio
Manufacturer:....................................................................................Quaife Racing
Clutch/Primary:.......................Bob Newby Racing belt, alloy clutch and front pulley


CHASSIS

Year/Type:..............1994, Owner/Welbro Engineering, 7020 Aluminium twin beam
Swing Arm:............Suzuki 1100, heavily modified. Will be replaced by Welbro item
Forks:.................................................................Kayaba Upside Down Grand Prix
Rear shock:.......................................................Kayaba Grand Prix, Titanium spring
Fasteners:.......................................................Titanium, through drilled, safety wired
Overall weight.............................................................................................310 lb.!


WHEELS/TIRES

Wheels:...............................................................Marchesini Magnesium Grand Prix
Brakes:.......................AP Racing Grand Prix Calipers/ Carbon Fibre or Steel Rotors
Tyres:.......Michelin Grand Prix, Wets, Intermediates or slicks (not available to public)


http://people.exeter.ac.uk/pbhook/harley.htm

5 comments

  1. I remember reading about this hillclimb monster in the Streetfighters hard cover coffee book (http://www.trademe.co.nz/books/nonfiction/transport/bikes/auction-437746670.htm)

    ReplyDelete
  2. You're right, the bike was made by its owner to participate in races uphill in the mountains

    ReplyDelete
  3. Nicodanger13:
    ..e lavorandoci un pò potrebbe diventare anche bella oltre che efficace!!

    ReplyDelete
  4. Le teste Feuling 4v hanno sempre dato problemi, anche e soprattutto a livello di aspirazione, con la plenum chamber, sulla quale potevi montare due carburatori ai lati opposti del motore (il kit prevedeva due Dell'Orto). E la distribuzione, made in Rivera, faceva saltare le punterie iderauliche ogni 3x2. Interessante, ma poco godibile.

    ReplyDelete
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    ReplyDelete

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