Question about 2005 Honda CRF 450 R

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Same problem hard to start using kick start

I took my 2005 crf 450 to honda and they told me that my valves need re shimmed and that was the problem...they said it was commen on crf's with the unicam because it only uses 2 cam lobes for intake and exaust and it puts alot of wear on the shimmes

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Sounds right, but shims dont really wear the valve sits in or the lobe wears, hence the need for re-shimming

Posted on Jul 22, 2009


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04 crf 450 starts hard most times we have to push start it but after that it starts fairly easy.

crf honda's run titanium valves which wear out very quickly if valve clearances not checked very regularly. what happens is the valve wears on its sealing face and clearances close up and then valve rides and looses compression,much like a leaking tap. bike will make more compression and valves will try to seal when warm. i probably rebuild one of these bikes a week with this problem. get it to your dealer and have clearances done. you can get stainless steel valve conversion kits which are much cheaper than honda titanium valves.

Aug 31, 2010 | 2005 Honda CRF 450 R

1 Answer

I have a real hard time getting the bike started. When its cold i can kick it...but once it dies out I cannot rekick it I have to pop start it. Its also very choppy does not run smoothly.

Many of those CRF have problems with the valves, check the valve clearances, as well as all the general maintenance items, clean carb, clean air filter, new plug.
If the clearances need more than one number smaller on the shims, it may be the start of valve regression.

May 20, 2010 | 2002 Honda CRF 450 R

1 Answer

04 crf450.hard start when cold(25deg).kick for 10min.once it

1. First thing is when was the last time you had your valves adjusted
2. On cold start up twist about 15 times on your throttle, as you do that the accelerator pump in carb will shot gas in cylinder, I have a 2003 yx426 & 2005 yz450 have to do to both of them when cold out to get started

Feb 07, 2010 | 2005 Honda CRF 450 R

1 Answer

CRF 250 R starts & runs fine when cool, not when hot.

it sound like electrical brake down under load check coil

Jan 11, 2010 | 2005 Honda CRF 250 X

1 Answer

Won't restart when warm

what plug you ruinning in there buddy also 4 strokes all have problems when starting 4 kick+1 revolution

Sep 24, 2009 | 2005 Honda CRF 250 R

3 Answers

04 crf450r hard starting

May be a decompression problem. What gear do you use when you pull it?

Apr 25, 2009 | 2005 Honda CRF 450 R

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