Mongoose BMX - Troubleshooting Guide

6 Maintenance
62
Problem Possible Cause Remedy
Slippingchain • Excessivelyworn/chippedchainwheelorfreewheelsprocket
teeth
• Chainworn/stretched
• Slinkinchain
• Noncompablechain/chainwheelfreewheel
• Replacechainwheel,sprocketsandchain
• Replacechain
• Lubricateorreplacelink
• Seekadviceatabicycleshop
Chainjumpingo
freewheelsprocket
orchainwheel
• Chainwheeloutoftrue
• Chainwheelloose
• Chainwheelteethbentorbroken
• Re-trueifpossible,orreplace
• Tightenmounngbolts
• Repairorreplacechainwheel/set
Constantclicking
noiseswhen
pedaling
• Schainlink
• Loosepedalaxle/bearing
• Looseboombracketaxle/bearings
• Bentboombracketorpedalaxle
• Loosecrankset
• Lubricatechain/adjustchainlink
• Adjustbearings/axlenut
• Adjustboombracket
• Replaceboombracketaxleorpedals
• Tightencrankbolts
Grindingnoisewhen
pedaling
• Pedalbearingstooght
• Boombracketbearingstooght
• Adjustbearings
• Adjustbearings
• Adjustchainline
Freewheeldoesnot
rotate
• Freewheelinternalpawlpinsarejammed • Lubricate.Ifproblempersists,replace
freewheel
TROUBLESHOOTING GUIDE