2005 Honda CRF 450 R Logo
Posted on Feb 07, 2010
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04 crf450.hard start when cold(25deg).kick for 10min.once it

04 crf 450.hard start when cold(25deg).kick for 10min.once it does start it wont run for real long and stalls.after doin this for couple of minutes itll finally high idle.back fires the hole time untill it warms up they runs good.starts right up warm

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  • Posted on Feb 07, 2010
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Joined: Feb 04, 2010
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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





  • Hoytr Aug 05, 2011

    I have a 2005 crf 450 when first try to start I don't have much compression when it does start it runs like a champ I had the valves adjusted awhile ago the guy who did it said there is an adjustment for the kick start compression? Did I hear him right?

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04 crf450 wont stay running
Check both valves could be stuck
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Aug 30, 2010 • 2004 Honda CRF 450 R
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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.
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03 CRF450 R push starts and runs, will not kick start.
the bike might have to much oil in the bike so when you try to kickstart it, it sends oil to the piston and soaks the spark plug in oil. But when you push start it the spark plug is going alot so it catches, just kicking it doesnt give enough spark tho. my bike doesnt the same and then somtimes i have to take the spark plug out and clean it with a wire brush then usually its fine. Or you could have the wrong oil in the bike, i would read the maunal to find the perfered oil. hope this helps
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Sep 07, 2009 • 2003 Honda CRF 450 R
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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
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Jul 22, 2009 • 2005 Honda CRF 450 X
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In 4th and 5th gear at full rev seems like
If it is hard to start after it stalls, it is probably getting too much fuel. Could be dirt in the float valve. Also try running a hotter spark plug
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May be a decompression problem. What gear do you use when you pull it?
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Apr 25, 2009 • 2005 Honda CRF 450 R
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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.
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