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1979 Madison Taipan

1979 Madison Taipan

My custom build of the Aussie DB Large Pro!

The rare '79 looptail Madison Taipan, off the same Koizumi factory line as the identical (in every way, bar the gusset hole) Diamondback Large Pro frame of the same year but even harder to find. 

Light and beautifully made, as one would expect from Koizumi, I can count on one hand the number of these Koizumi Taipan frames that I know exist. A documented history of the early Taipan frames is limited, but both the 1979 'VM' serial Taipans (mooted to have come out of the Kuwahara factory, using Tange tubing, as with the early 'VM' DB Large Pro) and the succeeding 1979 'baseball' Koizumi Taipans (noticeably better welds + a few other minor differences), appear to have been commissioned as simply a gusset variant to the Diamondback Pro on the same production lines. The history and development of these, Japanese manufactured, looptail Madison Taipan frames appears inextricably linked to that of the early DB Pros.

Restoration of all the parts and the design and fabrication of the decalset and padset was done by me personally (I love the hands-on stuff!). The frame was beautifully refinished in Super Yellow gloss powder coat by Roberto's Custom Powder. It's easy to see that the early DB aesthetic was my inspiration for the build design, the custom decals and padset. I've nicknamed the build Bumblebee as a tribute to the world-famous-in-New-Zealand yellow and black HMX-500 BMXs of the same era. I mean, when you find a Japanese built, American designed, Aussie frame, why not name it after a slice of Kiwi history? ;)

There's heaps more pics of the finished build, along with a detailed build blog with lots of design and parts restoration pics on my BMX blog here: 


Frame: 1979 Koizumi Madison Taipan, 4130 Chromoly, baseball serial
Forks: Akisu, stamped 1980 
Wheels: Skyway Tuff II, sealed bearing,  with Dicta 16T freewheel
Cranks: Takagi Tourney 170
Chain ring: Takagi 130BCD 44T
Seat clamp: Suntour
Stem: Sugino DB
Decals: Custom Madison Taipan Pro Decals, inspired by the DB Large Pro set of the era
Pads: Custom Madison Taipan Pro pads, inspired by the DB Large Pro pads of the era
Seat: Kashimax MX, black suede
Brakes: Dia Compe 890, stamped Feb 1982 (+ Odyssey Slim by Four clear pads)
Brake Levers: Dia Compe MX124, stamped July 1985
Brake Cables: Hi-Tech,
Headset: Neco, aluminium, sealed bearing
Bars: Race Inc, aluminium
Grips: Oury Waffle
Tires: Kenda Comp III
Chain: Izumi 
Chainring bolts: Chromoly
Seat Post: Fluted aluminium
Pedals: Cycle Pro TTK (early 80s) polished aluminium
Bottom Bracket: YST sealed square taper


Material: 4130 Chromoly 
Frame weight: 2.295 kg
Head Tube angle: 75°
Seat Tube angle: 68°
Top Tube length: 480mm (18 7/8")
Frame weight: 2.295kg (5lb 1oz)
Rear dropout thickness: 3mm (1/8")
Wheelbase: 930mm (36 5/8")
Bottom bracket height: 290mm (11 7/16")
Chainstay length: 375mm (14 3/4")
Serial stamp: Inside left rear dropout

My initial build design sketch...

Koizumi Madison Taipan build sketch

More pics...

The 'Bee 'n' Me...

  • Race
  • Company: Madison
  • Model: Taipan
  • Wheel Size: 20"
  • Headtube angle: 75
  • Seattube angle: 68
  • Toptube length: 18 7/8"
  • Headtube size: 1"