Sears
Cycling

Model # 545457950 Official Sears 20" boys' bmx bicycle

Here are the diagrams and repair parts for Official Sears 545457950 20" boys' bmx bicycle, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 44 parts  |

Chain Guard 074029
#21

Unit parts diagram

Chain guard

Part #074029

The manufacturer no longer makes this part, and there's no substitute part

Lifestyler Brake Tool 103015

#NI

All parts diagram

Lifestyler brake tool

Part #103015

The manufacturer no longer makes this part, and there's no substitute part

Kent Chain W/link 072007
#22

Unit parts diagram

Kent chain w/link

Part #072007

The manufacturer no longer makes this part, and there's no substitute part

Seat Post 032012
#30

Unit parts diagram

Seat post

Part #032012

The manufacturer no longer makes this part, and there's no substitute part

Kent Pedal 070021
#20

Unit parts diagram

Kent pedal

Part #070021

The manufacturer no longer makes this part, and there's no substitute part

Pr Sprocket 106002
#23

Unit parts diagram

Pr sprocket

Part #106002

The manufacturer no longer makes this part, and there's no substitute part

Rr Wheel Asm 045507
#24

Unit parts diagram

Rr wheel asm

Part #045507

The manufacturer no longer makes this part, and there's no substitute part

Kent R Spk/npl 049511
#14

Unit parts diagram

Kent r spk/npl

Part #049511

The manufacturer no longer makes this part, and there's no substitute part

Seat Clp Asm 035005
#27

Unit parts diagram

Seat clp asm

Part #035005

The manufacturer no longer makes this part, and there's no substitute part

Bca Tool 103017

#NI

All parts diagram

Bca tool

Part #103017

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty
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 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty
Time required
 45 minutes or less

Articles and videos for gas walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…