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slaurents
Scrubbed it
Joined: 19 Oct 2006
Posts: 1187
Location: Bell City, La.
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 Posted: Mon Jan 25, 2010 7:29 pm Post subject: Valves on a CRF250r |
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My bike has been getting very hard to start. Mostly cold. Some one told me that valve's could cause this. I checked the valve clearence. The left intake valve is pretty much on the money (.005). I can't even get the smallet feeler gauge (.015)in on the right intake valve. Does this mean that the right intake valve is stuck or just out of adjustment? Both ext. valves are at .011 to .013. Book calls for .011. The .013 is real tight and leaves scratches on the feeler gauge.
Any input is appreciated.
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Scott Laurents
CRF-250 #77
LOSKILZ
Aaron Laurents
CRF-150 #54
Lil Five-O
"To find the truth, you gotta read between the lines." |
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drbrown
Poser
Joined: 29 Nov 2006
Posts: 73
Location: Lumberton
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| Posted: Tue Jan 26, 2010 4:39 pm Post subject: |
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I assume that the clearance on the tight int. valve is .0015 instead of .015. If so, then the valve seat and face are wearing. You need to pull the cylinder head and inspect/replace the valves soon. This is very common in the CRF 250 and 450s. There are options other than OEM components. Feel free to call me if you need any help. I am sure that Monty and others on this board have some input on this too!
409-658-5045
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Dr. Brown
God is my only sponsor....
Kristina 2007 TTR230
Ashley 2006 YZ250F
David 2005 CR450R |
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slaurents
Scrubbed it
Joined: 19 Oct 2006
Posts: 1187
Location: Bell City, La.
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| Posted: Tue Jan 26, 2010 9:20 pm Post subject: |
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Thanks, I am going to pull the top end and take it to get fixed. Now all I have to do is save up some more pennies.
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Scott Laurents
CRF-250 #77
LOSKILZ
Aaron Laurents
CRF-150 #54
Lil Five-O
"To find the truth, you gotta read between the lines." |
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fofiddy 3
Scrubbed it
Joined: 14 Mar 2009
Posts: 1262
Location: dequincy la
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| Posted: Tue Jan 26, 2010 9:32 pm Post subject: |
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i agree with doc if they show the slightest wear on the back side replace them.piston rings too. youll be good to go for a while
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Raphael Benoit 450R #3
Lawrence Benoit 150R #53
CUSTOM HOME BUILDERS
FSRNUR RACING |
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WALKINGWOUNDED
OH-BE-JUAN !
Joined: 17 Oct 2006
Posts: 3089
Location: Beaumont
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| Posted: Wed Jan 27, 2010 11:01 pm Post subject: |
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"Adjusting the valves is just something to do until the new ones come in"
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Monty Salyer CRF450R X2-CR134R #045
Reese Salyer CR250R #746 aka Chicken Lips
Montys Motive Inc. European And Japanese Automotive Service - Beaumont, Tx 409-860-4923
Gravett Racing - Beaumont, Tx 409-861-0555
Cowboy Honda - Beaumont, Tx 409-751-6001 |
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fofiddy 3
Scrubbed it
Joined: 14 Mar 2009
Posts: 1262
Location: dequincy la
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| Posted: Thu Jan 28, 2010 6:49 pm Post subject: |
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| WALKINGWOUNDED wrote: |
| "Adjusting the valves is just something to do until the new ones come in" |
I wanna thank you big daddy
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Raphael Benoit 450R #3
Lawrence Benoit 150R #53
CUSTOM HOME BUILDERS
FSRNUR RACING |
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