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Everything You Need to Know About Checking And Shimming Valves
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- Опубліковано 13 бер 2012
- This is Tech Lesson 3 | Checking and Re-Shimming Valves. A new Tech Lesson will be uploaded every Wednesday. Thanks for watching and I hope these are helping!
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Dont get me wrong, this is a good video. But I would love a remake of this video. Knowing how amazing your production skills are now I think you could make this video at least twice as good! Especially with something as frequent and critical as valve adjustments!
or valve replacement. pretty plzzz :)
Wow the young grasshopper has come along way. I'm an old timer been turning wrenches since the late 70s but I'm always willing to learn or see a different technique boy knows his way around the screaming eagle
I agree 100% possibly a dual cam valve adjustment haha
agreed, and although this video is thourgh it isnt everything i need to know about shimming valves i was hoping for somthing way more involved
My valves are ticking, so I see this video and I’m like “this seems good” then when it start I say “Oh damn, it’s one of my favorite UA-camrs! Cameron Niemela!”
you explain it better than most mechanics that works for the pros. Good job and keep it coming.
Thank You! I appreciate the kind comment.
you're welcome. I am actually rebuilding a CRF 150rb engine as we speak. Do you have any videos for the lower end? I'm replacing all the bearings.
Ro Cayas Unfortunately I have not done any videos on the bottom end.
OneOne9 Creations I will subscribe so I am updated! What I like about your video. You talk slow enough and clear enough that we can actually understand without having to watch it over and over. Your video is clear and up close, LIKE IT SHOULD BE! The last video i watched was of a pro mechanic for kawasaki doing a top end and he was talking fast. His video would show step 1 while hes talking about step 3. His camera was 10 feet away while he's describing how to find top dead center and aligning the marker/arrows which took him 10 minutes by the way. An up close shot would have been worth 1000 words and your video does just that. Thanks again, i will be using your video to check my valve clearance and change shims on my 150 and 450.
Ro Cayas
Thanks so much for the awesome feedback, it really is great to hear that people find the videos helpful. I hope to do more in the future. I know Rocky Mountain ATV has some great videos on engine rebuilt and assembly.
Great Video! i love that someone is doing stuff like this, i'm an aspiring young mechanic and these videos have been pricelessly helpful to me, please keep up the good work! Big supporter right here!
Great video super
Great Video Cameron, i know you recently beat cancer and i have the same cancer you had which is (ALL) or Acute Lymphoblastic Leukemia and i can tell you cancer sucks but i love your videos and they actually have made me a better mechanic when working on my dirtbike so thank you and seeing your cancer video was very inspiring and pushes me to fight too. God Bless🙏🙏
Thanks Riley! All the best to you, praying for you. Let me know if there's anything I can do to help
@@CameronNiemela Keep uploading that's all i ask man, great content!🙏🔥
To be honest, you have the best/most informative videos about motocross on UA-cam! Your camera actually works, you are informative, and you explain in detail. Keep up the good work!
The king of fixing up dirt bikes. 10 years. What a champ!
Thanks! The tool I was using is an ASV Y-Handle. It has a 8mm, 10mm, and 12mm on it, very handy tool to have.
That was a great video - well done. Removed a good bit of mystery from the process !
Thank you for thoroughly explaining the way to figure out new shim size. You made it easy to understand.
I am lost lol
i agree with RC... very detailed and well explained. its rare that i enjoy watching a "how to" vid mainly because people just run through it and dont give any detail. great job man
this will be used as a refresher course and "go to" vid when my son and i tackle his 05 crf450r. im sure the basics are the same. thank you
At last, a tutorial where the camera is on a tripod. Thanks for the vid!
Thanks! I'm glad these videos are appreciated, a lot of effort goes into them.
Nice. You were born to make a video in youtube, i didn't know you start this youtube long time ago untill i watched this. Thanks
How to calculate shim sizes(Easy)
Formula:
A = (B - C) + D
A = New Shim Thickness
B = Recorded Valve Clearance
C = Specified Valve Clearance
D = Old Shim Thickness
I just did this because i found the video unclear, Hope it helps!
If you can't get a feeler gauge in, you will have to go down on the shim size until you can get a reading. Then you can follow the procedure in the video to get the correct clearance. Thanks for watching!
Great video man!! I would love to know as much as you do about motors. Im kinda scared opening my motor apart. I have a 2016 kx250f and have not been riding becuase of the valve's😔
I'd rather do this then stupid fork seals I hate dealing with forks I've rebuilt motor top and bottom end but I will not fuck with forks
@Clint McCaleb
Thanks! Glad you liked the video.
Josh Blockeed
You need to hold the crankshaft to remove the cam bolts. Take the round sight cover off as shown in the video and have someone hold the crank with an allen wrench. If that doesn't work, use an impact wrench or use a swift motion to get the bolts loose before the cam has a chance to move. But do not try to jam the cam with anything.
Josh Blockeed
Some heat might help, but you just need to hold the crank from spinning and it will come loose.
Well done. One of the best vids I've seen on this subject. Clear, concise, nice video work with the high speed at the appropriate times. Thank you for creating this.
Thanks so much for the positive feedback! Glad the video is helpful!
I'd like to see a video like this for my specific bike, a Husky TE511. I suspect things are similar and think shims will be needed on my bike as well. Used to have a CRF450R this would have been applicable to.
Your vids are awesome and have helped me alot with my 250! Thanks so much for what your doing, keep the videos coming. Subscribed!
Good video. The first time I watched one of these valve adjustment videos I was confused as hell. Now I've seen a few and it finally clicked. I was able to adjust my valves with no problems.
That's great to hear! Glad I could help.
Right on, I've got enough confidence in my understanding to tackle this job myself now. Thanks alot
Glad I could help! Thank you for watching.
Perfect. Not. Lot of BS. Straight to the point
The equation is (correct valve clearance- recorded valve clearance) + (old shim size) = new shim size. For example, if the specified clearance is .15mm and your current clearance is .05mm, and you have a 2.00mm shim, then you would do: (.15mm-.05mm = .1mm) + 2.00mm = 2.10mm. You would need a 2.10mm shim or the closest size to it. If you can't get a clearance, go up the specified clearance amount then measure again.
Wrong.
If your valve clearance is already too small, you are going to need a thinner shim, not a thicker one?
So therefore a 1.90mm shim is needed to open up the clearance.
Thanks for watching! Glad I could help!
I ended up ordering the MSR 32 leaf set. Increments of .01mm from .03-.10, then .03mm up until .40mm. From what I could tell, it actually has the exact same gauge thickness as the bike master. Glad we think alike!
It really depends on how often you clean the air filter and how hard the bike is ridden. This bike had 35 hours on it (from new) with the filter being cleaned every ride before the valves went slightly out of spec. If the bike is being trail ridden, the valves will last much longer.
Your getting better in front off the CAMERA everytime..man good job..keep up the good work
Who else got lost halfway through?
Ended The Clan me
The math got me 👀😂
The math got me fucked
Math butt raped me 🤣🤣
Anyone who understood the arithmetic is deluded.
It is wrong on so many levels.
You are right except for the exhaust have shims also. The shim sits in the valve spring retainer.
i have not understand how u did the calculation on the valve clearance,what is the manufacture specification,
I have been doing valves for 45 years and I cant understand it either !
The arithmetic is all wrong on this otherwise good vid.
Lol.
Measuring in thou and shimming in metric while not explaining the thought process.
Checkd and treble checkd and thats what i got. Was on thumpertalk and someone was saying its normal for valves to receed and lose clearance. Have checkd valves with micrometer and all is well, so have ordered bigger shims that will get them bang on speck.
You measure just the shim, like shown in the video. Thanks for watching!
HUGE SHOUT OUT TO CAMERON NIEMELA FOR EXPLAINING. THANK YOU ALL THE WAY FROM SOUTH AFRICA. Great tutorial video.
Ok, I understand. No problem, hope the video helped. Thanks
I would guess that they need to be seated before the intakes open. What cam are you using? Aftermarket?
Thankyou!!! I'm so glad u you do tech lessons I learn alot and I would not be working on my bike if it wasn't for you
Great video man, might have to watch the math you did there a couple of times before i order shims from honda. but i really hope this does the trick to help my bike to start normally. it took me a good 7 to 9 minuets of kicking to start it up to adjust the pilot and idle screw when it got warm, only to have the same horrible cold start.
i hope this video will be accurate for a 2007 crf r.
Thanks for the quick reply and ill be coming here from now on for my questions
Hey OneOne9 -
Your videos are awesome!
Thanks for making and posting them... PLEASE Keep'em coming!
Thank you for watching! I'm glad you enjoy them.
Hey man awesome video, I have a question on how to calculate the new needed shims, Im doing an r6 engine and the spec is between .23-.30 for ex and .13-.20 for in and i have 4 shims that are a bit off of spec, so how do i decide which spec to use in the calculation? would I just use the middle number of each? Thank you.
If it's all stock then that's just how the valve overlap is supposed to be. Did you get it running good?
Why would the exhaust open before any fuel enters the motor? Any engine allows intake in before the exhaust goes out.
Thanks! I ordered the side plate backgrounds from JJW Designs in WA state.
My bike was missing a few shims when I got it. How do I find out which I need? I have a 2002 yz426f. Any help would be amazing. Still a great video to this day!
Cheers!
This video helped me out a bunch. Ive watched a ton on valve shims, but your the only one who ever explained it to where I could actually undersatnd the shim process...Thanks alot bro....And what is the name of that tri-wrench type deal you used for the seat and side shroud bolts?
Nice video been watching Tamir stuff for quite a while I work on bikes in building lots of them also Pro flat track bikes but this is the first video I've seen it does not say anything about adjusting the valve on the exhaust or how to
Yes, that is correct. You do not need to remove the cam or loosen the cam chain tension if you are only checking the clearance.
Yes, if your bike has a Honda Unicam engine the lobes should be facing towards the rear of the bike at TDC. I don't think the bike would run if the cam was installed backwards. Make sure that you are at TDC. Take the spark plug out and look to see if the piston is at the top of the stroke.
Quick question…when your crank mark is lined up with the case mark and your cam is lined up properly, where is your flywheel “F” mark at? I did a rebuild and believe my timing is off but not exactly sure how.
Thanks in advance.
Any chance of doing a modern updated video using your newer camera and techniques?
I have a 2018 crf250r and I'll have to do this service... Only thing is I'm a bit worried I won't be able as I've never done anything technical like this...!
You do a great job explaining your work 💪🏾unlike most videos on UA-cam 😭
Much thanks, appreciate you watching the video!
I bought mine off of eBay. It is a factory Honda manual and can be purchased at most motorcycle shops or online stores.
Well done. Take out the plug as well to assist in getting engine to TDC. Might be picking up a 2010 CRF250 this spring :D
Yes, a TRX450 should follow a similar procedure. It sounds like your valves are out of adjustment or carburetor needs tuning.
Can someone give me a hand. I shimmed my valves the other day. I set to top dead center, ziptide timing chain to cams, pulled the tensioner. Shimmed then put journal bolt back in checked gaps then put the tensioner back in my cams weren't at TDC. I check my crankshaft and it was off top dead center so rotated it back and cams were off. Is it possible for the timing to be off if the crankshaft slightly moved if chain was ziptide to cams? Could it be just because my chain is stretched? Thanks
I'm guessing if everything is stock that is normal. What you mentioned about the backfiring and hard to start is consistent with valves that are out of adjustment. The engine would not run if you there were valve overlap issues. The problem was with the valve adjustment. Also, cam timing is not going to affect the valve overlap.
Cameron Niemela ... got an 05 crf450x ... impossible to start when cold but starts and runs great when warm. Gotta continuously crack throttle which leads me to believe it is starving for fuel but would out of alignment valves cause a similar hard starting scenario? No backfire. Dirty carb?
Nice work, very thorough. thanks!
Great video. But
Where does the .12 come from?
.12 is the specified valve clearance.
I get it now. I was adjusting the valves earlier on my 150r and your video helped out man. Thank you!
I would suggest a Bike Master feeler gauge set from Rocky Mountain ATV/MC. It goes in .01 increments on the smaller sizes which should work fine.
I would love to do this to my bike but I'm really just starting to learn some more in depth maintenance. I just bought a new bike and want to get everything checked out. How much would it cost for me to have a mechanic to check out everything and do this or just revalve my bike in general. There are 450 miles on my bike so I rounded it roughly to about 15 hours. By the way I have a 2005 yz250F
@EL ES,
To be honest, I have no idea. Never had it done before.
How easy should it be to check the exhaust clearance? (Under the rocker arm). Super small size feeler guage went in like butter but oem spec took some angling and a firm wiggle. Is that normal? Does the rocker arm have enough up and down play to give a false measurment?
Nice Tutorial!
Haha this is so funny compaired to your new videos
Recently my crf250r 2011 had poblem with the camshaft. It wasted a little bit. I have the option to buy a camshaft without bearings, descompresor and sprocket. Is very sheap if i buy the camshaft plane than an entire camshaft. My question is, if i get out the sprocker of the camshaft it can get out of time??? And how to prevent that?? I want to buy the plane camshaft to pass bearing sprocker and desconpresor because all of them are in good condition.
Thanks! There is no way you can calculate the size of the shim you need if you can't get a feeler gauge in. You will have to install a smaller shim until you can get the gauge to go in. Once you have clearance, you can calculate the required shim.
Backfiring means a lean condition. It is either an air leak or carb needs to be jetted richer.
Just reshimmed my valves and I had to use the smallest shim on both my intake valves (1.20) is that bad? Am I going to need new valves ?
on the "L" cap theres a second hole beside the one where the bolt goes towards the back of the bike, is there something that goes in there that is attached to the cap that could fall out or is that there for another reason?
very informational. i'm 16 and i am buying a bike that needs a head and this will help me make it through the project.
Thank You! Good luck on your project.
So it went down the timing chain hole? Get an extendable magnet and fish it down there for a while. Should be able to get it out no problem. If not, you'll have to pull the stator cover off.
Ya we need a new valve video your way better at videos now
Well done. Good video.
Well as i told you my bike just began to do that recently and i live in a pretty hot place in gulf of Mexico so we ride in very hot conditions and i never knew that any bike of my friends do that. Thats why im a little skeptic about it. We know that the dirt bikes get really hot but you know i guess it is what it is! Thank you very much man for your time and go on with your videos are pretty helpfull!
hi, i have a crf450r 02 and im going to reshim but there is 3 different diameters of shims. one is 7,48mm and 8,90mm and 10,mm. wich ones do i buy for the intakes????
Hey so my 2015 150rb was taken apart because it had some issues with the camshaft holder getting torn apart and long story short I had to replace the piston, valve, and camshaft/camshaft holder. I am having struggles trying to get the shims measured correctly. I have the cylinder head and the camshaft off the bike and I put in the new shims according to the measurements and now I over shot. I re ran the math and it still seemed correct. Do I need to have the camshaft and cylinder head on the bike connected to the timing chain and the bike in TDC to be able to get correct readings when measuring the shims.
I'm having trouble moving the bearing over right before you take the timing chain off. Should this bearing be easy to slide over or should it take quite a bit of force?
The bearing should slide quite easily. You may have to use a rubber mallet to break it loose if it's an older bike.
I would suspect the valve adjustment is too loose or something is going on with the timing chain adjuster, causing the timing chain to be loose. Check the valve clearances and the timing chain slack.
How did you get 1.98?? In don't understand what you did to get that number so from a .005 my r intake valve is .003 what shim do I need?
I recently got a 2004 CRF 250, having a hard time start it, so I cleaned the carb, still doing it, i adjusted the valves, the clearances were .002 and .004 on the intake side, now they are .005 and .011 on the exhaust... still having a hard time starting, I decided to take in to a shop, the guy wants to do a top end rebuild with new valves and everything for $800 does that sounds good to You????
looks like a great tutorial I have to do this on my sons crf soon
+muddymotos Thanks, glad I could help.
this video was alot of help thanks man
Thanks, the Y-handle is a ASV brand.
Great video Cam. Your a winner matey
Thank you for the video. I would like to know what will happen if there is no clearance at all any of the valve
Great video at explaining most of Everything you just confused me on the numbers
Thats because the numbers are wrong.
Thanks for answering my earlier question. How about another.. mine is hard to start and once its warm it shuts off. .should i start simple with carb, or check valves??
Yes, the procedure will be very similar.
Excellent video that mate extremely helpful thanks very much 😁👍
If I were changing piston and rings, would it be necessary to remove the left side crank case to remove the Cam chain guide? I doing a top end on my 2010 CRF250
Yeah if you pull off the stator cover you can access the cam chain and guides
Hello i have a problem with my crf 250R 2006 it's very difficult to turn on the bike and when it happens the exhaust tube get so hot it goes red almost catch a fire. Does it ring the bell to you? Do you think its a valve problem?
The exhaust header getting red hot when idling is fairly normal. But hard starting could be the result of valve clearance being off. Check your valve clearance.
Sorry for the questions . But but can you explain how to do the sums do you divide or subtract as I don't understand. Sorry and thanks for the quick reply and for posting your great videos
hello Cameron I've got a 2018 yz 450 f could you please tell me what the correct amount of oil in each fork is ?
your video is awesome and very informative. problem is I have a 2006 rmz450. valves are
different.wish someone did like your video for mine
You will have to measure the shim with a set of micrometers or calipers to determine the thickness.
how much would it cost to get something like this done by a mechanic/technician
Yes
i dont really understand the math part i dont know where the numbers came from someone please help.
ErUpT me either I wish he wrote it out more I just don’t get it
I think it is the size of shim minus the clearance then the difference is add to the actual size of old shim so he get the size of new shim...
Check valve clearances first..always convert these measurements to mm, very important. Then minus the CORRECT spec number from your out of spec number you took with your feeler gauges ( if its already in spec then your fine) now just add the width of your shims to that number. This will be the size of your new smaller shims
Valve clearance - spec clearance + old valve shims.
like
You can get the single shims from a dealer or online OEM parts store.