The Tomos 4L page 4 U      Tech

Here are the technical specifications of the TOMOS 4L

copied from the workplace-manual

 

Motor - one-cylinder piston-timed 2-stroke
Stroke - 43 mm
Bore - 38 mm
Cylindervolume - 49 cc
Compressionratio - 7,0 : 1
Max. torque  - 29,3 kgcm at 3500 r./min.
Max. r.p.m. - 6500 r./min.
Crankshaftbearing - Steyer / NSK / SKF type L17
Crankshaft axial tolerance - between 0,04 - 0,12 mm
Mix ratio oil : petrol - 1 : 25  (4%)
Cylinderbody - cast iron
Cylinderhead  - aluminium
Needleposition  - in second gap from the top
Jetsize - 66 (.66 mm?)
Ignition - Bosch Flywheelmagnet 6 Volt - 17 Watt
Pre-ignition - 1,8 - 2,0 mm before T.D.C.
Breaker distance - 0,35 - 0,45 mm
Sparkplugtype - Bosch W 225 T1
Electrode distance - 0,5 mm
Number of gears - 4
Rimsize - 18 "
Tiresize - 22 x 2 X 2,50
Chain  - 1/2 x 3/16 (inch)
Spoke - 3 mm -178 mm long
Empty weight - 57 kg
Tankcontents - 5,5 liter ( 0,5 liter spare)
Max. load - 205 kg
Length  - 1850 mm
Width  - depends on the handlebar and feet-rest type
Height - 1150 mm (with a small handlebar)
Contents Gearbox - 400 cc motoroil SAE 30
Cont. back shockabsorber - 48 cc shockabsorberoil SAE 20 (each)
Cont. front shockabsorber - 60 cc shockabsorberoil SAE 40 (each)
Lightbulps
- front 6V  15/15 W
- rear 6V 5 W
- stop 6V 5 W
Transmissionratios : 
- 1 gear 59,91 : 1
- 2 gear 31,34 : 1
- 3 gear 21,99 : 1
- 4 gear 17,14 : 1
Framenumber - right in frame above joint of backwheelfork
Motornumber - right in the carter under the cylinder
Mainshaft  - 0.1 t/m 0.3 mm (Mainshaft = most backend shaft, the one with the chainwheel on.)
Pedalshaft axial tolerance - 0.2 upto 0.5 mm
Shiftshaft axial tolerance - 0.1 upto 0.3 mm
Middleshaft ax. tolerance - 0.1 upto 0.3 mm (Middleshaft = Xmas-tree)
   

Electrical circuit      - yellow = Current (6V)

                                 - Black = shortcut (stop)

                                 - grijs = rearlight

                                 - green = stoplight

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last updated 9-2-99


1999 PnP-Systems Holland