Specifications

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Chapter 5 Wheels, brakes and tyres
17 Fault diagnosis: wheels, brakes and tyres
Symptom
Cause
Remedy
Ineffective brakes
Handlebars oscillate at low speeds
Machine lacks power and poor
acceleration
Brakes grab when applied gently
Brake pull-off spongy
Harsh transmission
Worn brake lining or pads
Foreign bodies on brake linings surface
Incorrect engagement of brake arm
serration
Worn brake cam
Renew.
Clean.
Reset correctly.
Renew.
Buckle orflat in wheel rim, most likely front
wheel
Tyre not straight on rim
Brakes binding
Ends of brake shoes not chamfered
Elliptical brake drum
Badly worn pads
Brake cam binding in housing
Weak brake shoe springs
Worn or badly adjusted final drive chain
Hooked or badly worn sprockets
Loose rear sprocket
Worn damper rubbers
Check rim alignment by spinning wheel.
Correct by retensioning spokes or building
on new rim.
Check tyre alignment.
Warm brake drum provides best evidence.
Re-adjust brakes.
Chamfer with file.
Lightly skim on lathe.
Renew.
Free and grease.
Renew if springs have not become displaced
Adjust or renew.
Renew as a pair.
Check bolts.
Renew rubber inserts.