Question about 2005 Honda CRF 450 R

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

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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.

Posted on Sep 02, 2010

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1 Answer

My 04 crf 450 is leaking oil out of the air box breather


Hi, Jmattison21 and the usual suspects are:
1. Oil tank/system overfilled.
2. Faulty breather valve.
3. Engine breather hose bent, pinched, kinked etc.
4. Air filter has too much "pre-oil".
5. Crankshaft seal failure allowing transmission fluid to migrate.
6. Blow by drain tube cracked/split or filled to capacity.
For more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Engine Oil leaking out of my CRF 450 air Box
Oil coming out of airbox 2012 CRF 450
Honda CRF450X 2005 Service Manual
OEM parts for Yamaha
Honda CRF450R Owner Manual

Dec 22, 2010 | 2004 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

Same problem hard to start using kick start


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

Jul 22, 2009 | 2005 Honda CRF 450 R

1 Answer

2002 honda crf450r starting problem


Hi Smit,

here are some thread that will really be helpful for you and your bike.

http://www.thumpertalk.com/forum/archive/index.php/t-589583.html

http://www.supermotojunkie.com/showthread.php?p=862289

http://www.mototips.com/general-bike-repair/21014-crf450-04-hard-start-cuts-out.html

happy trails,

regards,

voodoo

Jul 22, 2009 | 2005 Honda CRF 450 X

1 Answer

Crf 450 running hot


Back firing usually indicates a timing problem.

Apr 30, 2009 | 2002 Honda CRF 450 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

1 Answer

Crf 450 front preload adjustment


Hi ...... Any preload and/or damping will be adjustable from the top of the forks (even upside down forks). Anti-clockwise to reduce, clockwise to increase. You may find that a previous owner has increased the 'weight' of fork oil as a cheap/easy alternative to adjustment or aftermarket linear or progressive springs.

Dec 29, 2008 | 2005 Honda CRF 450 R

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