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 Valve Adjust Procedure for YZ250F/YZ400F/426F/450F
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Posted: 05/29/08
04:37 PM
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I just bought the single shims that i needed. Only cost me 8.75 each.
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pin_it
Addict
| Posts: 2471
| Joined: 01/05
Posted: 05/30/08
10:12 AM
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Guys, these YZ/F's are bullet proof! I keep my bike maintained like you guys do, but with one exception...I hit the rev limiter, and I hit it often! I have over 65 hours on the stock piston, rings and the valves havent moved since the break in adjust I did.
Its safe to say I got my time out of my piston, because im changing it and going to a 13.5:1 Compression piston, but I checked my valves yesterday when I pulled the motor, and guess what?! They haven't moved!
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Posted: 05/30/08
10:15 AM
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Any bites on ur 450f?
 
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pin_it
Addict
| Posts: 2471
| Joined: 01/05
Posted: 05/30/08
10:20 AM
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Yup! Last night I let a guy who rides a nice 06 YZ250 ride my bike, and I rode his... I asked if he wanted to trade and he said yup! So I should have a YZ250 here in a day or two.
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honda342
New User
| Posts: 1
| Joined: 06/08
Posted: 06/03/08
02:45 PM
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top man, much easier now you've explained.
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Posted: 07/14/08
08:10 PM
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great step by step instructions! it looks just like my bike when it was tore apart.
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Posted: 09/08/08
05:27 PM
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Holy crap pin.. i love you I've been in need of this
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Posted: 12/03/08
02:52 PM
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Pin it,
Assume post man!!!!!!!!! I wonder if I could trouble you for something. I tried to print this post but I can't figure out how. Can you convert to a PDF file and send this post to my email account so that I can save it and/or print it????????? nileslewis@aol.com
Thanks,
Chris
Ride that thing like someone else stole it!!!!!!!!!!!!!! 
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Mmulisha
User
| Posts: 62
| Joined: 12/08
Posted: 12/10/08
06:21 AM
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That was superb, Very nice clear photos and very good description
Also your bike is pretty clean lol
Yz 125 2007
Dep pipe/Dep silencer
One industries kit
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Posted: 01/30/09
07:59 PM
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hey im working on an 03 version of your bike and its not going back together as planned. i read your message and i came across the part that said if i dont take the towers off in a star pattern that they might warp, i didnt take them off in a star pattern so im thinking thats the problem i just want another opinion.
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Posted: 03/20/09
01:26 PM
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Great job, Pin_it. Very well done with great photos. I'm new to the 4-strokes and was a little intimidated to check the valves but once I saw your photos/verbage-easy. Thank you for taking the time to document this. 2-thumbs-up.
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expence
New User
| Posts: 5
| Joined: 06/09
Posted: 06/09/09
09:58 PM
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can some one please tell me the valve clearence specs on a yzf426 so i can at least see if there in spec
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Posted: 06/30/09
06:25 PM
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great job very well done 10 out of 10 with me i will ask you for sure if i have any questins with any engine problems if thats ok and everyone else if they read my add lol thanks for taking the time to do that.
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Autismspeaks.org check it out
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life in the fast rut!!!!
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my rides- 2008 yz250f fully modified, use to be j-laws bike
&
IT400 1979 yamaha!!!
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Home: SO CAL
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RangerMat
New User
| Posts: 1
| Joined: 09/09
Posted: 09/04/09
09:00 AM
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very helpfull. thanks!
yamaha of troy yz250f
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