90 OWNER’S MANUAL
TROUBLESHOOTING CHART
PROBLEM POSSIBLE CAUSE REMEDY
Chain jumping off
Chainring bent Replace Chainring
Chainring loose Tighten mounting bolts
Chainring teeth bent or broken Replace Chainring
Rear or front derailleur side-to-side
travel out of adjustment
Adjust derailleur travel
Constant clicking
noises when pedalling
Stiff chain link Lubricate or replace link
Loose pedal spindle / bearings Adjust bearings / spindle nut
Loose bottom bracket spindle /
bearings
Adjust bottom bracket
Bent bottom bracket / pedal spindle Replace bottom bracket / spindle
Loose crank Tighten crank bolt
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