Engine - Husqvarna CR 65 2012 Workshop Manual

GENERAL INFORMATION
CR 65 2012

Engine

Single cylinder, 2 stroke
Bore .........................................................................................................45 mm
Stroke ...................................................................................................40.8 mm
Displacement .................................................................................. 64.89 cu.cm
Compression ratio ......................................................................................9.1:1
Fuel system
Carburettor type MIKUNI.........TM24
Maximum jet .................................................................................................240
Minimum jet ....................................................................................................40
Lubrication
Engine .............................................. fuel-oil mixture at 3% during running-in, at 2% after running-in.
Primary drive/gearbox with oil inside the crankcase
Cooling
Liquid-cooling with double radiator
Ignition system
Spark plug type..........................................................................NGK BR8 ECM
Spark plug electrode gap........................................................................0.6 mm
Kick .............................................................................................................start
Primary drive
Drive pinion gear ........................................................................................ Z 23
Sprocket .................................................................................................... Z 75
Transmission ratio ......................................................................................3.26
Gearbox
Type ............................................................................ constant mesh gear type
Transmission ratio
1st gear...................................................................................... 2.846 (z 37/13)
2nd gear .................................................................................... 2.125 (z 34/16)
3rd gear ..................................................................................... 1.722 (z 31/18)
4th gear ..................................................................................... 1.428 (z 30/21)
5th gear ..................................................................................... 1.217 (z 28/23)
6th gear ..................................................................................... 1.083 (z 26/24)
Secondary drive
Transmission sprocket ............................................................................... Z 14
Rear sprocket ............................................................................................. Z 48
Transmission ratio ......................................................................................3.43
Drive chain
Make and type .............................................................."D.I.D." 420 - 1/2" x 1/4"
Chassis
Type single frame, in steel tubes with rectangular and oval section;
rear chassis in squared sectioned tubes in light alloy.
Suspension
Front
Type ........................................upside-down telescopic fork with advanced axle
(damping rebound and compression adjustment);
Tubes ................................................................................................... ø 35 mm
Wheel travel...........................................................................................220 mm
Rear
Type .................................... progressive "Soft Damp" with hydraulic monoshock
(spring preload, rebound and compression damping adjustment)
Wheel travel...........................................................................................270 mm
Workshop Manual Ed. 09-2011
A.3