www.tigercubandterrier.com
  • Welcome
  • Introduction
  • The Story begins...
  • An Interview with Mr Turner
  • Model information
    • Terrier T15
    • Tiger Cub T20 >
      • 1954/55
      • 1956
      • 1957
      • 1958
      • 1959
      • 1960
      • 1961/62
      • 1963-on
    • Competition Cub T20C
    • Sports Cub T20S
    • Woods Cub T20W
    • Sports Lights Cub T20SL
    • Trials Cub T20T
    • Street Scrambler T20SS
    • Scrambler T20SR/T20SC
    • Trials & Scrambler TR20/TS20
    • Sports Home Cub T20SH
    • Mountain Cub T20SM/T20M
    • War Department (T20WD/T20M WD
    • Bantam Cub T20B
    • T20B Super Cub
  • Buyer's Guide
  • Resources
  • Technical
    • Machine Numbers
    • Gear Clusters
    • Front Forks
    • Front Fork Oil Change
    • Condensers
    • Finding T.D.C.
    • External Oil Filter
    • Lucas Energy Transfer
    • 12V Conversion
    • Fitting Indicators to a Tiger Cub
    • Fitting a Craven Luggage Rack
    • Spark Plugs and Sparks
    • Know your Alternator
  • Your Stories
    • My Wee Cub
    • Denny's Terrier
    • A T20C Story
    • TR20 Cub Sorted
    • Saving Sylvia
    • My 1959 Tiger Cub
    • My First Restoration
    • Found in a Scrap Yard
    • My First Bike
    • Brand new out of the Box
    • On the Road after 40 years
    • First bike I ever Rode
    • The' Tarbuk' Conversion
    • A Tiger Cub in a Box
    • Aunt Tiny
    • Well-travelled Terrier
    • Mashooq's Tiger Cub
    • 48 Years with my Cub
    • Ready for the Arbuthnot
    • My Collection of Cubs
    • Mountain Cub and Cafe tales
    • My favourite Cub of all
    • A Cub in Norway
    • Beginning of a Terrier Restoration
    • An Ambush of Cubs
    • A T20C Cub (probably!)
    • A Moment Frozen in Time
    • Finally after 56 years!
    • Still riding Cubs after 60 years
    • A Lakeland Venture
    • Back to my Teens!
  • The Princeton Cubs
    • Class of 2009 - 2010
    • Class of 2010 - 2011
    • Class of 2011 - 2012
    • Class of 2012 - 2013
    • Class of 2013 - 2014
    • Class of 2014 -2015
    • Class of 2015 - 2016
  • Machines in Competition
    • Bonneville Speed Record
    • ISDT Success
    • Success in the Scottish
  • TC&T Mysteries
    • The Terror
    • Who is this?
  • Buy - Sell - Swap
  • Welcome
  • Introduction
  • The Story begins...
  • An Interview with Mr Turner
  • Model information
    • Terrier T15
    • Tiger Cub T20 >
      • 1954/55
      • 1956
      • 1957
      • 1958
      • 1959
      • 1960
      • 1961/62
      • 1963-on
    • Competition Cub T20C
    • Sports Cub T20S
    • Woods Cub T20W
    • Sports Lights Cub T20SL
    • Trials Cub T20T
    • Street Scrambler T20SS
    • Scrambler T20SR/T20SC
    • Trials & Scrambler TR20/TS20
    • Sports Home Cub T20SH
    • Mountain Cub T20SM/T20M
    • War Department (T20WD/T20M WD
    • Bantam Cub T20B
    • T20B Super Cub
  • Buyer's Guide
  • Resources
  • Technical
    • Machine Numbers
    • Gear Clusters
    • Front Forks
    • Front Fork Oil Change
    • Condensers
    • Finding T.D.C.
    • External Oil Filter
    • Lucas Energy Transfer
    • 12V Conversion
    • Fitting Indicators to a Tiger Cub
    • Fitting a Craven Luggage Rack
    • Spark Plugs and Sparks
    • Know your Alternator
  • Your Stories
    • My Wee Cub
    • Denny's Terrier
    • A T20C Story
    • TR20 Cub Sorted
    • Saving Sylvia
    • My 1959 Tiger Cub
    • My First Restoration
    • Found in a Scrap Yard
    • My First Bike
    • Brand new out of the Box
    • On the Road after 40 years
    • First bike I ever Rode
    • The' Tarbuk' Conversion
    • A Tiger Cub in a Box
    • Aunt Tiny
    • Well-travelled Terrier
    • Mashooq's Tiger Cub
    • 48 Years with my Cub
    • Ready for the Arbuthnot
    • My Collection of Cubs
    • Mountain Cub and Cafe tales
    • My favourite Cub of all
    • A Cub in Norway
    • Beginning of a Terrier Restoration
    • An Ambush of Cubs
    • A T20C Cub (probably!)
    • A Moment Frozen in Time
    • Finally after 56 years!
    • Still riding Cubs after 60 years
    • A Lakeland Venture
    • Back to my Teens!
  • The Princeton Cubs
    • Class of 2009 - 2010
    • Class of 2010 - 2011
    • Class of 2011 - 2012
    • Class of 2012 - 2013
    • Class of 2013 - 2014
    • Class of 2014 -2015
    • Class of 2015 - 2016
  • Machines in Competition
    • Bonneville Speed Record
    • ISDT Success
    • Success in the Scottish
  • TC&T Mysteries
    • The Terror
    • Who is this?
  • Buy - Sell - Swap
www.tigercubandterrier.com
Tiger Cub T20 (& T20J) 1958
​Much carried on the same as the previous year for the T20 model with the exception of the appearance on some machines of a new Zenith carburettor, which over the tried and tested Amal carburettor, was found to give an increase in mid-range torque, improved acceleration up to a 60mph but with the loss of a little top speed.
Picture
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​Also to appear was a new one-piece petrol tank badge to become known as the 'Mouth Organ' type, a smaller version of the one used on Triumph's larger machines.
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The famous Nacelle containing the black-faced 80mph speedometer, ignition and light switch, and gear indicator still remained.
Picture
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​​Engine-wise a new duplex chain, engine and clutch sprocket sat in the primary chaincase; a much stronger item than the previous single row assembly.
 
The colour scheme was still Crystal Grey and black (Aztec Red and black - USA models) although a larger silencer was to be seen fitted in an attempt to quieten down the Cub's growl.
Interestingly a T20J 'Junior' Cub had been developed specifically for certain USA states where 14 - 16 year olds were allowed to ride motorcycles as long as the engine produced less than 5bhp. To effect the reduction in brake horsepower, a restrictor plate was fitted between the carburettor and cylinder head lowering the T20J's output to 4.95bhp @ 5700rpm. In every other detail the Junior model was identical to the full power Cub.
 
Specifications for 1958 T20 model
 
Engine
Type: Single-cylinder OHV, unit construction
Capacity: 199cc (12.1 cu in)
Bore/Stroke: 63mm (2.480in) x 64mm (2.520in)
Compression: 7:1
Power: 10bhp (7.5 kW or 10.1 PS) @ 6000 rpm
Carburettor: Amal 332/3 3/4in choke size or Zenith 17MXZ-CS5
Camshaft: Standard - valve clearances In & Ex 0.010in (cold)
Clutch: Wet multiplate
Gears: 4
 
Cycle Parts
Front Suspension: Telescopic forks, hydraulic damped
Rear Suspension: Swing-arm
Front Wheel: 16 inch (WM2 rim)
Rear Wheel: 16 inch (WM2 rim)
Front Tyre: 3.25 x 16
Rear Tyre: 3.25 x 16
Brakes: 5.5 in dia. Single leading shoe drum front and rear
Petrol Tank: 3 1/8 gallons (14.00 litres)
Oil tank - 2 3/4 pints
Gearbox - 1/3 pint
Primary chaincase - 1/2 pint
Front Fork: 1/8 pint
 
Electrics
Type: Lucas Ignition Coil
Voltage: 6
Charging Type: Alternator / Rectifier
Ignition Timing: 4 degrees BTDC static. 28 degrees fully advanced
Points Gap: 0.014in - 0.016in
Spark Plug: Champion L7 or equivalent
Spark Plug Gap: 0.025in
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