Monday, December 20, 2010

Mark Walkers hand built 2000cc VTwin Drag Racer

I visited Mark on the weekend and he kindly supplied me with some video footage of the Big Green Dragster.

He got the bike out for a bit of a display in the main street of Dorrigo.

You can see (and hear) how this beastie runs.


Heres some info Mark & Lynne provided.

MW Special

a Completely Hand-Built Drag Bike

by Mark Walker V2

After modifying standard engines for years Mark decided in 1975 to make his own.

Mark says he got his inspiration to carve his engine from solid blocks of metal from Bugatti’s  mechanical sculptures, the hand-scraped masterpieces of the 1920’s & 30’s.

This bike has been registered and run for over 30 years, and been kept within ANDRA drag race ruling.  Mark’s dream was chasing the illusive 7 seconds, during that period,  but actually more than that was his huge passion for working on the

MW Special,  ”it was like a living thing…. It didn’t live or breath until I bought it to life…  developing it and manufacturing many parts to keep it running ….. many heartbreaks and ego shattering moments over this length of life, which is the most precious asset you have… your time.”

MW Special -  Drag Bike Specifications:

Top speed: 160 mph    8 seconds flat

2 Litre, 90 Degree V-Twin

Bore:  114 mm   Stroke: 101 mm

Compression ratio: 10.1

Horsepower: 300 bhp. (Est.)

Carburetion: Two 50.8 mm  Injectors per Cylinder machined from 5083 solid billet

the Bellmouth are spun from aluminum sheet.

Exhaust: 1 pipe 2 ½ inch per head.

Ignition: 1 x spark plug per cylinder.

1 x Mallory magnetos – rotating magnets.

Slipper Pistons: Machines 5083 billet aluminum

Connecting Rods: 7000 series Aluminum Plate

Big End:  Slippers

Fuel:  90 % Nitro delivered by a mechanical fuel injection system.

Flywheels: machined from steel billet

Crankcase and Cylinder Heads are machined: Two  9 x 9  5083 billet plate

Cylinder Heads – 4 valve twin cam. The inlet valves are 44 mm  &the exhaust are 40 mm; the valve guides & valve seats are machined from aluminum bronze bar.

Camshafts: 4 camshafts machined from solid 2 inch round bar and nitrided.

2 years to build.

No comments: