Question about Honda CRF 100 F Motorcycles

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Crf100 has a weak spark

Changes spark plug but spark still weak

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  • Anonymous Mar 21, 2014

    changed all electrical components, have spark from plug to frame but not between electrode and plug tip

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  • 56 Answers

Its the coil or magneto one of these two will cuase a weak spark they are simple to replace though

Posted on Dec 30, 2008

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  • 6 Answers

SOURCE: crf100 has a weak spark

You may have dirt/water in-/ behind the stator plate, remove right side (as you sit on it) plate and check for any kind of debris. Clean and find point of entry - repair and seal.

Posted on Dec 30, 2008

  • 3567 Answers

SOURCE: 2006 crf100 no spark

You have 2 basic possibilities,

  • A kill switch is active
  • The ignition control module has gone bad
The stock spark plug is an NGK CR7HSA. Is a kill switch on? Does the side stand have a kill switch? Is it working properly? Check the operation of all kill switches with a volt ohmmeter.

Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? If still no spark, get CDI system checked at the dealers shop.

A top rating on this answer? Thanks!

Posted on May 24, 2009

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2006 crf100 no spark


You have 2 basic possibilities,
  • A kill switch is active
  • The ignition control module has gone bad
The stock spark plug is an NGK CR7HSA. Is a kill switch on? Does the side stand have a kill switch? Is it working properly? Check the operation of all kill switches with a volt ohmmeter.

Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? If still no spark, get CDI system checked at the dealers shop.

A top rating on this answer? Thanks!

May 24, 2009 | 2005 Honda CRF 100 F

2 Answers

My honda crf100 will not start i have change the spark plug and air filter the only way it will run is if I spray starter fluid into the carb and keep sraying it into the carb otherwise is just shuts down


it the bike has been sitting for a long period of time. the carb. can gum up. pull the carb. off. clean it up really good. insuring you get all the small ports clean. then try it again.
every dirt bike i've had requires a oil wetted air filter. dont forget about that.

Feb 23, 2009 | 2005 Honda CRF 100 F

1 Answer

Crf100 has a weak spark


You may have dirt/water in-/ behind the stator plate, remove right side (as you sit on it) plate and check for any kind of debris. Clean and find point of entry - repair and seal.

Dec 30, 2008 | 2005 Honda CRF 100 F

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