Question about 2005 Honda CRF 100 F

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What,s the reason for my honda crf 100 sparkplug getting so dirty all the time i need to keep cleaning it to get it to fire everytime can anyone assist on this problem please help????????????????

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The bike may have the wrong spark plug in it. The stock plug is NGK, CR7HSA. You may want to go to a hotter plug > CR6HSA. It is also possible that a prior owner installed a bigger main jet. Check the main jet size. The jet will have a number stamped on one side. Stock is #92. A #98 jet would be a richer jet. Please rate my answer. Thanks.

what,s the reason for my honda crf 100 sparkplug - 45a6947.gif

Posted on Sep 13, 2010

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1 Answer

2005 crf 70 wont start.new plug and wire.


Hi and welcome to FixYa,

Initial checks:
  • check for spark on the sparkplug when starting;
  • check that fuel is reaching the combustion chamber (sparkplug would be wet);
  • check for engine compression.

Postback results.

Good luck and thank you for asking FixYa.

Dec 28, 2009 | 2005 Honda CRF 100 F

2 Answers

Honda CRF 100 F, 2008 - no driver manual


here you go

http://powersports.honda.com/2009/crf100f.aspx

http://www.cyclepedia.com/honda-crf80-crf100-online-service-manual/

http://www.themotorbookstore.com/hocrcronsema.html

Dec 24, 2009 | 2005 Honda CRF 100 F

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run wire from one side bolt to other side and try again if it works coil is bad did you replace plug and check gap?

Jul 04, 2009 | 2005 Honda CRF 100 F

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Anyone have a repair manual on 06 Honda CRF 100


is there some thing particular you want or just a full man for ref.

Jan 27, 2009 | 2005 Honda CRF 100 F

1 Answer

06 honda CRF 100 repair manual ANYONE HAVE


Turn the motor over clockwise until the punch mark on the gear lines up with the arrow mark on the side case. Check to be sure that the cam lobes are facing to the rear of the bike, if they are pointing toward the front keep going until they face back and the punch mark aligns up with the mark on the case.

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Check the cam gear to make sure the two marks on the gear are level with the surface of the head.
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Please rate this a fixya

Jan 27, 2009 | 2005 Honda CRF 100 F

1 Answer

Honda CRF 100 timing


Turn the motor over clockwise until the punch mark on the gear lines up with the arrow mark on the side case. Check to be sure that the cam lobes are facing to the rear of the bike, if they are pointing toward the front keep going until they face back and the punch mark aligns up with the mark on the case.ab798e0.jpg

Check the cam gear to make sure the two marks on the gear are level with the surface of the head.
559cda1.jpg

Please rate this FIXYA

Jan 27, 2009 | 2005 Honda CRF 100 F

2 Answers

2002 crf450, rough running, back firing, hard start


Classic valve train issues. Sounds like the valves are tight. One thing that concerns me is the "sudden onset". Valves usually tighten over time.
Make sure you also tighten the cam chain as well.

Dec 26, 2008 | 2002 Honda CRF 450 R

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