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Husqvarna SMR 450 User Manual

Husqvarna SMR 450
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G.1Part. N. 8000 B0148 (02-2008)
ENGINE OVERHAULING
Section
G
Cleaning of components ........................................... G.2
Assemblies ............................................................... G.2
Cylinder head ........................................................... G.2
Recutting the valve seats .......................................... G.3
Valve guides ............................................................. G.5
Replacement of valve guides .................................... G.5
Valve ........................................................................ G.6
Valve spring .............................................................. G.6
Installation of valves .................................................. G.7
Inspection of rocker arm............................................ G.8
Starter decompressor ............................................... G.8
Camshaft .................................................................. G.9
Camshaft chain and gearing ..................................... G.10
Camchain tensioner .................................................. G.10
Cylinder .................................................................... G.11
Piston ....................................................................... G.11
Cylinder-piston fitting................................................. G.12
Gudgeon pin ............................................................. G.13
Piston rings ............................................................... G.14
Piston rings/cylinder clearance .................................. G.14
Piston ring/Piston rings groove clearance.................. G.15
Gudgeon pin/connecting rod small end clearance ..... G.15
Connecting rod big end radial clearance ................... G.15
Connecting rod big end side clearance ..................... G.16
Crankshaft ................................................................ G.16
Connecting rod small end bush replacement............. G.17
Clutch unit ................................................................. G.18
Clutch housing-friction disc clearance ....................... G.18
Clutch spring (excluded SMR 450-R) ........................ G.18
Oil pump ................................................................... G.20
Gear selector fork and gearing .................................. G.20
Selector drum ........................................................... G.21
Carburettor overhauling (TC-TXC-SMR 450 R) ......... G.21
"Keihin" carburettor adjustment (TC-TXC-SMR 450 R) .. G.22
Carburettor checking ................................................. G.23

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Husqvarna SMR 450 Specifications

General IconGeneral
Engine TypeSingle cylinder, 4-stroke
ClutchWet multi-disc, hydraulic
Front BrakeSingle disc, 310 mm
Rear BrakeSingle disc, 220 mm
Front Tire120/70 R17
Rear Tire150/60-17

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