Honda CB125 CB160 (1972) [31/139] Refer to fig 3 7

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3 5 CLUTCH A Description and operation of clutch As shown in the previous figure the clutch is a wet multi plate type and consists of the outer clutch pressure plate friction disc clutch plate and clutch center etc For transmitting rotation from the crankshaft to the transmission the clutch has the role to engage or disengage power It also provides for starts and stops which do not unreasonably load the engine Refer to Fig 3 57 When the right crankcase cover is removed the outer clutch complete is exposed To the outer clutch complete the clutch spring driving the clutch pressure plate is installed The clutch plate is installed with the clutch friction disc between the clutch center with four 6X18 hex bolts The clutch plate has teeth cut on the inside These teeth are engaged with teeth cut on the outside of thé clutch center The clutch center is coupled to the transmission main shaft by spline Hence irand the transmission main shaft are essentially a single unit The clutch plate clutch center and clutch pressure plate rotate On the other hand to the groove cut on the ex terior circumference friction disc is of coupled the by outer the clutch collar the clutch entering the groove freewheeling rotation with the transmission main shaft is obtained Hence while the clutch is connected the outer clutch center five clutch plates five clutch friction discs and clutch pressure plate are essentially a single unit through friction exerted by the clutch spring rotation of the crankshaft is trans mitted to transmission system Inside the outer clutch the primary driven gear Refer to Fig 3 58 When the clutch lever is gripped the clutch ad juster rotates clockwise the adjustment thread is pushed out by the square headed thread in the clutch adjuster fitted to the left crankcase cover this is pushed out by the clutch joint through the clutch rod The clutch spring is compressed and the five clutch friction discs and five clutch plates become disengaged Hence the rotary motion of five outer clutches and five clutch discs is not transmitted to the clutch center Refer to Fig 3 58 and 59 Fig 3 59 Sectional view of clutch adjustment thread 25

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