Technical Data - Husqvarna SMR Owner's Manual

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TECHNICAL DATA

ENGINE

Type .....................................................single cylinder, 4 stroke

Cooling.......................liquid with electric fan on TE-SMR models

Bore (250)....................................................................2.99 in.

Bore (450-510)..............................................................3.81 in.

Stroke (250)..................................................................2.17 in.

Stroke (450) .................................................................2.39 in.

Stroke (510)..................................................................2.67 in.

Displacement (250) ...............................................15.22 cu. in.

Displacement (450)................................................27.39 cu. in.

Displacement (510) ................................................30.56 cu. in

Compression ratio...........................................................12,9:1

Starting (TC)............. kick start (with automatic decompressor)

Starting (SMR)...............electric (with automatic decompressor)

Starting (TE-TXC) ...............electric and kick start (with automatic

decompressor)

TIMING SYSTEM

Type....................................double overhead camshaft; 4 valve

Valve clearance (with engine cold)

Intake ..........................................................0.004 ÷ 0,006 in.

Exhaust........................................................0.006 ÷ 0,008 in.

LUBRICATION

Type .......Dry sump with two oil pump rotor and cartridge filter

IGNITION

Type ...........................................C.D.I. electronic, with variable

advance (digital control)

Spark plug type ......................................................NGK CR8EB

Spark plug gap...........................................................0.027 in.

FUEL SYSTEM

Type (TE-SMR)...............................................................Electronic injection feed

e (TC-TXC 250) "Keihin" FCR-MX 37 with acceleration pump and

Typ

throttle position sensor

Tipo (TC-TXC 450-510) Keihin" FCR-MX 41 with acceleration pump

and throttle position sensor

Venturi diameter (TC-TXC 250) ..................................................1.46 in.

Venturi diameter (TC-TXC 250-450)............................................1.61 in.

High speed jet (TC-TXC 250) ..........................................................175

High speed jet (TC-TXC 450-510) ....................................................180

Low speed jet (TC-TXC 250) ............................................................42

Low speed jet (TC-TXC 450-510)........................................................45

Starting jet (TC-TXC 250)..................................................................72

Starting jet (TC-TXC 450-510) ..........................................................85

Starting air jet. .........................................................................0.16 in.

Main air jet ...................................................................................200

Low air jet .....................................................................................100

Floater ......................................................................................g 11.2

Throttle piston..............................................................................15 M

Metering pin ............................................................................OBDVR

Metering pin slot (TC-TXC 250). ......................................................4th

Metering pin slot (TC-TXC 450-510).................................................5th

Idle mixture adjusting screw (TC-TXC 250) ......................rounds 1+1/2

Idle mixture adjusting screw (TC-TXC 450-510)....................... rounds 2

PRIMARY DRIVE

Drive pinion gear- Clutch ring gear (TC 250) .............................Z 20- Z 67

Drive pinion gear- Clutch ring gear (TE-TXC 250)........................Z 24- Z 88

Drive pinion gear- Clutch ring gear (450-510)............................Z 23- Z 63

Transmission ratio (TC 250)..............................................................3,350

Transmission ratio (TE-TXC 250)........................................................3,666

Transmission ratio(450-510).............................................................2,739

CLUTCH

Type...............................oil bath multiple disc clutch, hydraulic control

TRANSMISSION

Type ...............................................................constant mesh gear type

Transmission ratio (TE-SMR-TXC)

1st gear......................................................................2,000 (z 28/14)

2nd gear .....................................................................1,611 (z 29/18)

3rd gear .....................................................................1,333 (z 24/18)

4th gear.....................................................................1,086 (z 25/23)

5 th gear....................................................................0,920 (z 23/25)

6 th gear ....................................................................0,814 (z 22/27)

Transmission ratio (TC)

1st gear......................................................................1,866 (z 28/15)

2nd gear (250)...........................................................1,529 (z 26/17)

2nd gear (450-510) ....................................................1,444 (z 26/18)

3rd gear ....................................................................1,263 (z 24/19)

4th gear. ....................................................................1,086 (z 25/23)

5 th gear....................................................................0,954 (z 21/22)

SECONDARY DRIVE