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WorksheetsMotorcycle Transmission
Total questions: 15
Worksheet time: 8mins
Transmission vibration under load can be caused by:
Worn clutch friction plates
Worn gear dogs
tight spots in the drive chain
excessive backlash in the clutch shock absorber
In the gearbox illustration, if the 6th shifted gear on the driveshaft is moved to the left, which gear is enaged?
Second
Third
Fourth
Sixth
A customer complains of a "crashing sound" when engaging 1st gear from neutral.
worn dogs on first gear
over tight drive chain
clutch drag
faulty selector mechanism
Which of the following is NOT a probable cause of the gear failure shown?
Improperly fitted gear circlip
Bent gear selector fork
Gear Lever return spring worn
Excessive cam selector drum end float
What type of of gearbox is normally used in motorcycles?
Constant mesh
Constant Engagement
Sliding engagement
Sliding Mesh
A clutch has excessive free play, This could:
Cause the clutch to occasionally slip
make it difficult to disengage the clutch
Make the clutch wear excessively
Make it difficult to engage the clutch
A customer complains about imprecise and notchy gear shifting. Which of the following is the most likely to be faulty?
Sticking pawls
Worn cam grooves
Broken gear shift shaft
Worn shift forks
Severe tight spots have developed in a rear drive chain. What is the most likely cause?
The chain has been run too loose
The chain has been run over tight
The sprockets have worn eccentrically
A faulty chain.
The purpose of the cush drive within the rear wheel sprocket carrier is to:
Reduce chain noise
reduce vibration
reduce shock loading on the transmission
protect the rear wheel bearings
The name commonly given to the foot change selector mechanism is:
Positive stop
Shift return
Positive Shift
Positive return
The purpose of the sliding joint fitted to a motorcycle with a shaft drive is to allow for:
any purpose fluctuations that occur in the transmission
Changes in propeller shaft length due to movement
the drive to be transmitted through a variable angle
the drive to be transmitted at constant velocity
Which of the following faults may produce clutch slip?
Lack of free play
Snapped clutch cable
too much free play
Leaking master cylinder
Which of the following faults is most likely to produce clutch judder?
Badly worn centre plate
Insufficient free play
Excessive free play
Sticking clutch cable
A pinion with 15 teeth drives a gear wheel having 27 teeth, what is the gear ratio?
1.6:1
2.5:1
2.2:1
1.8:1
A gearbox provides a reduction of 4:1, what is the torque output if the torque input is 70nm: (Neglect frictional losses)
140Nm
210Nm
280Nm
350Nm
