Triumph, BMW, & Kawasaki Sales Spares & Repairs.
Established for over 40 years and run by expert motorcyclists.
Fully authorised workshop.
Produced from 1960 to 1966
Technical and Service Information
The following information is from the Instruction Manual for this model, published by Francis & Barnett Ltd:
Engine | 20T two-stroke | |
Cubic Capacity | 199cc (11.8 cu ins) | |
Stroke | 72mm (2.866 ins) | |
Bore | 59mm (2.3228 ins) | |
Rebore Sizes | 0.015" & 0.030" Oversize | |
Compression Ratio | 8.5 to 1 | |
Ignition Timing | Points begin to open 5/16"
before TDC |
|
Contact Breaker Gap | 0.012" | |
Sparking Plug Type | Lodge CCL 14 | |
Sparking Plug Gap | 0.018" - 0.022" | |
Correct Lamp Bulbs | Head - main
Head - pilot Tail Speedo |
6v, 30/24w, twin filament
pre-focus 6v, 3w MBC 6v, 18/3w 6.5v, 0.3amp MBC |
Carburettor | Amal Monobloc 376/231
Choke bore 1" Main jet 180 Pilot jet 30 Slide No 3½ Needle jet 0.106" Needle position - 2nd notch from top |
|
Sprockets
(Standard) |
Engine
Clutch Gearbox Rear Wheel |
18T 3/8" pitch
43T 3/8" pitch 18T 1/2" pitch 50T 1/2" pitch |
Chains | Primary
Final Drive |
3/8" x 1/4" x 0.225", 58 links
1/2" x 0.305", 121 links |
Rear Chain Adjustment | (Machine on stand) 1¼" whip approx.
(Rider Seated) ½" to ¾" whip. |
|
Overall Gear Ratios
(Standard) |
4 speed
6.5, 8.6, 12.0, 19.1 to 1 |
|
Hub Bearings | Front
Rear |
15 x 35 x 11mm
15 x 42 x 13mm |
Internal Gearbox Ratios | 1.0, 1,3, 1.85, 2.95 to 1 | |
Engine Main Bearings | Drive Side (2)
Flywheel Side (1) |
3/4" x 1 7/8" x 9/16"
3/4" x 1 7/8" x 9/16" |
Engine Big End Bearings | Steel Rollers (8) | 1/4" x 3/8" |
Steering Head Bearings | 1/4" balls - 19 top , 19 bottom | |
Wheel Rims | WM2 - 18 front & rear | |
Tyres | 3.25 x 18 L/W front & rear | |
Tyre Pressures
(Normal Solo) |
Front
Rear |
16 lbs/sq in
24 lbs/sq in |
Spokes | Front R/H
Front L/H Rear |
10 swg x 6 3/4" (18)
10 swg x 6 5/8" (18) 10 swg x 6 9/16" (36) |
Brake Drum Diameters | 5" front & rear | |
Brake Lining Width | 3/4" | |
Total Braking Area | 13 sq ins | |
Fuel Tank Capacity | 3¼ gallons | |
Fuel Mixture | Petrol/oil ratio 20 : 1 (see below *) | |
Oil Capacities: | Chaincase - fill to drain plug level
Gearbox - fill to level screw behind K/S crank Forks - per leg |
175cc
1 litre 55cc (one petroil filler cap measure) |
Wheelbase - static | 49¾" | |
Seat Height | 30½" | |
Ground Clearance | 6" | |
Width Over Bars | 26" | |
Overall Length | 78" | |
Approx. Weight | 267 lbs |
* - Editor's Note: In the manual, a petroil ratio of 16:1 is recommended for Castrol and "MobilMix TT" 2-stroke oils. However, modern semi-synthetic 2-stroke oils can run at higher ratios (where in accordance with the manufacturer's instructions), and will produce less pollution and carbon build-up.
From an archive of www.users.zetnet.co.uk/Francis_Barnett/ For more information on this page visit Emu Archives
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