Pro Series - Mini, Medium & Senior     

1981

Overview - Mini Pro

Frame and forks only with optional 1pc or 3pc kit.

Finishes: High Lustre Chrome

Lifecycle: Manufactured/fabricated from 1981 (April) until the end of year.

Serial number location (frame): inside of rear dropout starting 1 and ending with baseball type symbol (Kanji), (forks): inside of fork dropout starting 1 and ending in T

Decals: Initially snake (prismatic) but changed to newer razor style (blue) in July 1981

Rear dropout: approx 1/16" (2mm)

Top tube length: approx 17.25"

Build Components - Mini Pro

The spec below is based on what was standard but may also include changes throughout its lifecycle..n/a equates to not applicable

  • Frame: Double Butted 4130 Chromoly 0.9 Gauge (Koizumi)
  • Forks: Double Butted 4130 Chromoly 0.9 Gauge Arms, 0.6 Gauge Steerer (Koizumi)
  • Handlebars: Diamond Back small, 4130 chromoly, custom bend (Koizumi)
  • Grips: n/a
  • Headset: MX, Chrome (Tange)
  • Rims: n/a
  • Spokes: n/a
  • Hubs: n/a
  • Tyres: n/a
  • Brakes: n/a
  • Levers: n/a
  • Cable: n/a
  • Pedals: Diamond Back 1/2" or 9/16 (MKS)
  • Crank: Optional 1pc (sugino) or 3pc Diamond Back Chromoly(Sugino)
  • Bottom Bracket: Optional
  • Chainring: Optional (Sugino)
  • Spider: Optional (Sugino) or integral part of 3pc crankset (Sugino)
  • Freewheel: n/a
  • Chain: n/a
  • Seat: Optional
  • Seat Post: Optional

Overview - Medium Pro

Only one of the Pro range sold as a complete bike or just the frame and forks due to it being the most popular of the three sold and built by you or the retailer (At least in the US).

Finishes: High Lustre Chrome

Lifecycle: Manufactured/fabricated 1981 (April) to 1983

Serial number location (frame): inside of rear dropout starting 1, 2 or 3 and ending with baseball type symbol (Kanji), (forks): inside of fork dropout starting 1, 2 or 3 and ending in T

Decals: Initially snake (prismatic) but changed to newer razor style (blue) in July 1981

Rear dropout: approx 1/16" (2mm)

Top tube length: approx 178.2"

Build Components - Medium Pro

The spec below is based on what was standard but may also include changes throughout its lifecycle

  • Frame: Double Butted 4130 Chromoly (Koizumi)
  • Forks: Double Butted 4130 Chromoly (Koizumi)
  • Handlebars: Diamond Back MX Chromoly, Medium (Koizumi)
  • Stem: Diamond Back, Alloy Head, Chromoly Shaft (Sugino)
  • Grips: tbc (Oakley)
  • Headset: MX-2 Quick Adjust (Tange)
  • Rims: 7x, 20x1.75 (Araya)
  • Spokes: tbc
  • Hubs: Large Flange, Alloy (Suzue)
  • Tyres: Diamond Back 2.125 MX Skin Front, 1.75 MX Skin Rear (IRC)
  • Calipers: 890 MX (Dia-Compe)
  • Levers: Pre-bent (Dia-Compe)
  • Cable: (Dia-Compe);
  • Pedals: Diamond Back Design Forged w/Concave Cage, Chromoly Spindle (MKS)
  • Crank: Diamond Back Forged Cotterless Alloy MX-170 or 1pc 175 (Sugino)
  • Bottom Bracket type: US (Tange)
  • Chainring: 44T or 3pc machined teeth (Sugino)
  • Spider: (Sugino)
  • Freewheel: 16T (Suntour)
  • Chain: High Tech Chrome MX (HKK)
  • Seat: Diamond Back, Diamond Hole Pattern, 470g (Kashimax)
  • Seat Post: Fluted Alloy (STRONG)
  • Seat Post Clamp: Forged Alloy (Suntour)

Overview - Senior Pro

Frame and forks only with optional 1pc or 3pc kit.

Finishes: High Lustre Chrome

Lifecycle: Manufactured/fabricated 1981 (April) to 1982 (April)

Serial number location (frame): inside of rear dropout starting 1, 2 or 3 and ending with baseball type symbol (Kanji), (forks): inside of fork dropout starting 1, 2 or 3 and ending in T

Decals: Initially snake (prismatic) but changed to newer razor style (blue) in July 1981

Rear dropout: approx 1/16" (2mm)

Top tube length: approx 18.6"

Build specification - Senior Pro

The spec below is based on what was standard but may also include changes throughout its lifecycle

  • Frame: Double Butted 4130 Chromoly (Koizumi)
  • Forks: Double Butted 4130 Chromoly (Koizumi)
  • Handlebars: Diamond Back MX Chromoly, Large (Koizumi)
  • Stem: Diamond Back, Alloy Head, Chromoly Shaft (Sugino)
  • Grips: tbc (Oakley)
  • Headset: MX-2 Quick Adjust (Tange)
  • Rims: 7x, 20x1.75 (Araya)
  • Spokes: tbc
  • Hubs: Large Flange, Alloy (Suzue)
  • Tyres: Diamond Back 2.125 MX Skin Front, 1.75 MX Skin Rear (IRC)
  • Calipers: 890 MX (Dia-Compe)
  • Levers: Pre-bent (Dia-Compe)
  • Cable: (Dia-Compe);
  • Pedals: Diamond Back Design Forged w/Concave Cage, Chromoly Spindle (MKS)
  • Crank: Diamond Back Forged Cotterless Alloy MX-170 or 1pc 175 (Sugino)
  • Bottom Bracket type: US (Tange)
  • Chainring: 44T or 3pc machined teeth (Sugino)
  • Spider: (Sugino)
  • Freewheel: 16T (Suntour)
  • Chain: High Tech Chrome MX (HKK)
  • Seat: Diamond Back, Diamond Hole Pattern, 470g (Kashimax)
  • Seat Post: Fluted Alloy (STRONG)
  • Seat Post Clamp: Forged Alloy (Suntour)

Senior Pro - 2nd gen

1982

Overview

More information to go here and link to overview about the leverage update....

p>Frame and forks only with optional 1pc or 3pc kit.

Finishes: High Lustre Chrome

Lifecycle: Manufactured/fabricated 1982 (April) to 1983 (tbc)

Serial number location (frame): inside of rear dropout starting 1, 2 or 3 and ending with baseball type symbol (Kanji)

Serial number location (forks): inside of dropout starting 2 or 3 and ending in T

Decals: Initially snake (prismatic) but changed to newer razor style (blue) in July 1981

Rear dropout: approx 1/16" (2mm)

Top tube length: approx 18.6"

  • Frame: Double Butted 4130 Chromoly (Koizumi)
  • Forks: Double Butted 4130 Chromoly (Koizumi)