Top shelf guys. I bought one of these bikes a while back. It was garage stored for years and in amazing shape. I have been slowly rebuilding it this past winter, suspension re and re and everything thoroughly checked and replaced as needed. Your videos are an absolute goldmine.
I knew about timing them with the flywheel marks but aligning the cam marks without the bolts and then turning the cam to align the bolt holes was new to me. Very good idea. Great job RM!
I JUST WANNA GO FAST ........I DONT LIKE ALL THEM SHIMS AN VERNEER CALIPERS AN DIGITAL MICROMETERS .... AND ALL......CAM TENSIONERS ....GET THE COOL AUTO ADJ ONE ....AND 3 ANGLE VALVE JOBBERS AND SUCH I RECKON MMMMHHHM
"Now putting on the valve cover you want to make sure the surfaces are nice and clean and we went ahead and put a new gasket on it, as well".... Piece of fuzzy dust: "Au revoir, suckers!!"
TIP - Put the keepers in the retainer first then using spring compressor. As your compressing put your finger over the retainer to hold the keepers in place!!
my service manual mentions nothing about timing this timing mark (12:20) kinda makes sense why my compression timing wasnt right when i did everything else the way it instructs, it does mention timing from the right sight of the crank case while the engine is in tdc, but my cam chain must be out of sync with the marking? or if the right side is in line will the left side be too pls help xDD. Second edit maybe i put my cam gear in 180 degrees backwards is that possible?
ruclips.net/video/mMWLygPpvNQ/видео.html We covered the marks better in part one, so check that out. You can also use a long screwdriver down the spark plug hole to verify TDC, since it can be kind of hard to see when the timing marks are perfectly lined up. The cam sprocket will line up the same either way, just make sure the marks are facing out like in the video. -Charles
Not sure if anyone here can help but i got a cylinder works 100mm over bore kit for a 2008 crf450r and the gaskets i got are identical to the stock gaskets the base i would understand although it doesn't want to slip over the outside of the new cylinder without bending and rolling the edges but the top literally hangs inside of the cylinder and would get hit by the piston if i were to install it. I think they sent me a stock kit instead of an overbored version. Anybody know what size gasket it would need to be? I assume 101 or 102 mm if the cylinder bore is 100.
Valve shims are the hardest part about rebuilding the top end because you have to do simple math but it’s not rocket science , there’s a lot of videos on RUclips about timing and valve shims
When you line up your time and marks and you put your chain tensioner in it moves the cam gear a little bit is that OK ? or do I got to compensate for that Movement
It all depends on the condition of the valves, if they are cupped, pitted, bent or have any other wear or damage, then yes. You would want to have the new valves before machining the head because they need to match up to the seats when you're done. If the valves are like new, then all I'd worry about is the contact pattern. We just lightly used the cutters on our seats to clean them up and make sure the contact pattern was correct. If there was serious damage to the seats you would probably need to replace the valves as well. -Charles
Unfortunately, that Motion Pro tool has been discontinued but there is one from Pro Honda that should do the trick. Just make sure to enter your bike's year, make and model to ensure this will work. Pro Honda Cam Sprocket Holder- www.rockymountainatvmc.com/parts/pro-honda-cam-sprocket-holder-p
yeap, I was just considering a 4-stroke 450 since I sold my YZ 250 a few years back. These 2 videos put me off, I'm getting a 250 two stroke again, maybe a 500 if I can afford it. (But the video was helpful and great to watch, learned a lot about 4 strokes)
You made these videos like a month before I'm buying a 2005 450 that needs a top end. The timing is perfect because these videos are great. The guy I'm buying my bike from says that is lacks compression. Is there anything I should expect to have to fix besides the top end? Even if I spend 1000 on the bike I'll be within the budget for the price I got the bike for
Do the compression test, check your valves, and you might as well to a cam chain since they're cheap and easy to change out. I'm sure the bike has a lot of hours on it so make sure to really check the cylinder wall for damage. New spark plug.
Hey guys, im jdoing a trx450r i just picked up for a good price because it leaked oil from the base gasket. just took the top end apart to replace the gasket, seen the top end has very low hours so went to reassemble and i cant get the chain back on the cam gear.TDC and all theres not enough chain for the gear to slide onto cam. It came off fine though. Any suggestions?
I followed the service manual instructions to put oil on bolt threads for a linkage bolt and when tightened it to torque spec the dang thing stripped the threads off.
@@tysleight It was from the factory - nobody had touched it before. I just put a little oil on the threads and followed the Honda service manual torque specs.
@@311hitwall well that super sucks! Maybe it was built on the Friday before a 3 day weekend??? Is the 311 stand for the band or The police code of indecent exposure?
I bet your torque wrench’s arnt exactly right, I know my torque wrench’s are cheap and over tighten a lot of my bolts. I broke a left side cover bolt and it wasn’t even at the required torque yet.
@@blakejansen642 Could be but I used the same wrench after I got a new bolt - without the oil of course. Maybe the oil makes it easier to stretch the bolt and if the wrench is off a few pounds it doesn't end well.
@@rmatvmc thank you for all you do! You guys deserve much more attention. Sucks that people nowadays are afraid of motorcycles and bunch of pussies lol. Thanks again!
Hey bud I have a video on my page of my trx starter problem if you could check out and let me know what you think the problem is be gladly appreciated..
These 2 videos were so helpful, my top end is brand new now and saved me soooo much money compared to taking it to the shop. Thank you guys!
That's what we like to hear! Glad it helped you out!
Top shelf guys. I bought one of these bikes a while back. It was garage stored for years and in amazing shape. I have been slowly rebuilding it this past winter, suspension re and re and everything thoroughly checked and replaced as needed. Your videos are an absolute goldmine.
Unfortunately, my CRF is already rebuilt and working well. A few tips shown here would have help... Perfect tutorial. Great job!
I knew about timing them with the flywheel marks but aligning the cam marks without the bolts and then turning the cam to align the bolt holes was new to me. Very good idea. Great job RM!
I'm repairing my motorcycle Honda CRF 450 R. Thank you for the video
.
This makes me want to sell my 4-stroke and work on my 2-stroke.
I JUST WANNA GO FAST ........I DONT LIKE ALL THEM SHIMS AN VERNEER CALIPERS AN DIGITAL MICROMETERS .... AND ALL......CAM TENSIONERS ....GET THE COOL AUTO ADJ ONE ....AND 3 ANGLE VALVE JOBBERS AND SUCH I RECKON MMMMHHHM
EXCELLENT VIDEO THANKZZZ FOR SHARING!!!
Awesome love this video , ty Awesome work , best regards from sweden
Yo make everything look easy, love rocky mountain , cheer from Baja , learning from you guys to be able to fix friends bikes 🍻🏁
I just glad I own a two stroke.
Excelente vídeo. Saludos desde Argentina
25:17 god those head cover bolts are a pain to line up
Facts bro just got done mine and was like this should be the easiest
Very informative. Thanks
"Now putting on the valve cover you want to make sure the surfaces are nice and clean and we went ahead and put a new gasket on it, as well"....
Piece of fuzzy dust: "Au revoir, suckers!!"
I love how I take my bikes to the shop for an oil change then I watch this video lol.
If you can replace this, then you can apply information to v8. These crf, yzf KTM literally small formula one single engines.
TIP - Put the keepers in the retainer first then using spring compressor. As your compressing put your finger over the retainer to hold the keepers in place!!
my service manual mentions nothing about timing this timing mark (12:20) kinda makes sense why my compression timing wasnt right when i did everything else the way it instructs, it does mention timing from the right sight of the crank case while the engine is in tdc, but my cam chain must be out of sync with the marking? or if the right side is in line will the left side be too pls help xDD. Second edit maybe i put my cam gear in 180 degrees backwards is that possible?
ruclips.net/video/mMWLygPpvNQ/видео.html We covered the marks better in part one, so check that out. You can also use a long screwdriver down the spark plug hole to verify TDC, since it can be kind of hard to see when the timing marks are perfectly lined up. The cam sprocket will line up the same either way, just make sure the marks are facing out like in the video. -Charles
You didn't adjust the compression release on exhaust Valve
Great job Charles.
If you get the valve seats machined do you need different valves. Or do they add material then take away back to OEM size?
Not sure if anyone here can help but i got a cylinder works 100mm over bore kit for a 2008 crf450r and the gaskets i got are identical to the stock gaskets the base i would understand although it doesn't want to slip over the outside of the new cylinder without bending and rolling the edges but the top literally hangs inside of the cylinder and would get hit by the piston if i were to install it. I think they sent me a stock kit instead of an overbored version. Anybody know what size gasket it would need to be? I assume 101 or 102 mm if the cylinder bore is 100.
Hey man I want to know how much for Claire's how much water flavors
How I know what valve goes where ?
Plz explain more on the valve shims the timing.
Valve shims are the hardest part about rebuilding the top end because you have to do simple math but it’s not rocket science , there’s a lot of videos on RUclips about timing and valve shims
Where can I find the cam gear holding tool can’t find it on your website?
www.rockymountainatvmc.com/parts/pro-honda-cam-sprocket-holder-p Sorry I missed your comment, but here you go! -Charles
Does this make anyone else want to go buy some contact cleaner?
This makes me want to sell my 4-stroke and work on my 2-stroke.
😂😂 yeah im debating on buying it but I don’t think I need it
Yeah and some maroon scotch brite... 🤣
I'm such a slob
My engine boils a lot and drains the water from the radiator very quickly. How can I solve my problem?
Crf450r 2010?
Hi does the big bore kit require a piston change as often? And what is the safe work hours to change stock piston
What's the best break in oil do you recommend for a fresh rebuild
The same oil u always use
When you line up your time and marks and you put your chain tensioner in it moves the cam gear a little bit is that OK ? or do I got to compensate for that Movement
wouldnt you need new valves after machining the head?
It all depends on the condition of the valves, if they are cupped, pitted, bent or have any other wear or damage, then yes. You would want to have the new valves before machining the head because they need to match up to the seats when you're done. If the valves are like new, then all I'd worry about is the contact pattern. We just lightly used the cutters on our seats to clean them up and make sure the contact pattern was correct. If there was serious damage to the seats you would probably need to replace the valves as well. -Charles
@@rmatvmc thanks man
great video, Wouldn't it be a good idea to change the timing chain? Or is it not necessary?
Where did you get your cam gear holding tool
Unfortunately, that Motion Pro tool has been discontinued but there is one from Pro Honda that should do the trick. Just make sure to enter your bike's year, make and model to ensure this will work.
Pro Honda Cam Sprocket Holder- www.rockymountainatvmc.com/parts/pro-honda-cam-sprocket-holder-p
What dose it mean when you rev it on a cbr450r and it is missing
Actually ridiculous how much more complicated a 4 stroke is compared to a 2 stroke.
yeap, I was just considering a 4-stroke 450 since I sold my YZ 250 a few years back. These 2 videos put me off, I'm getting a 250 two stroke again, maybe a 500 if I can afford it. (But the video was helpful and great to watch, learned a lot about 4 strokes)
stop being demented
Make sure u use the vernia calapers on the end not in the middle off the jaws or you’ll have an in accurate reading
How many times has this engine been rebuilt since 2005 and has any work been done on it like machining, etc?
311hitwall I bet this is its first rebuild tbh
It was no virgin. Had a hot rods rod when disassembled
i missed how to know what shims ? , put in cam check to see if s how tight we got ? no explainig feeler gauges or how to figure out shims
ruclips.net/video/6l3xtLtddrQ/видео.html We did that in a separate video. Click the link! Thanks - Charles
How many pounds of torque does my crf 450r 2013 motorcycle have if you can help me xfa
The 2013 Honda CRF450R engine makes around 35 ft-lbs of toque.
Was the 2nd spring that he removed, mounted upside down??
You made these videos like a month before I'm buying a 2005 450 that needs a top end. The timing is perfect because these videos are great. The guy I'm buying my bike from says that is lacks compression. Is there anything I should expect to have to fix besides the top end? Even if I spend 1000 on the bike I'll be within the budget for the price I got the bike for
Do the compression test, check your valves, and you might as well to a cam chain since they're cheap and easy to change out. I'm sure the bike has a lot of hours on it so make sure to really check the cylinder wall for damage. New spark plug.
Hey guys, im jdoing a trx450r i just picked up for a good price because it leaked oil from the base gasket. just took the top end apart to replace the gasket, seen the top end has very low hours so went to reassemble and i cant get the chain back on the cam gear.TDC and all theres not enough chain for the gear to slide onto cam. It came off fine though. Any suggestions?
Is there a chain tensioner still putting pressure on the chain or have you removed the tensioner?
what happend whith adjustment of the decompresion rocker?¡¡¡¡¡¡¡¡
Tell me what I need to no about thatn0lease. Doing this motor right now. And he went to quick over timing and shims. Any advice
I followed the service manual instructions to put oil on bolt threads for a linkage bolt and when tightened it to torque spec the dang thing stripped the threads off.
Talk to the guy who did the job before you. Bet he said if tight is tight then a little more will be, more better.
@@tysleight It was from the factory - nobody had touched it before. I just put a little oil on the threads and followed the Honda service manual torque specs.
@@311hitwall well that super sucks! Maybe it was built on the Friday before a 3 day weekend??? Is the 311 stand for the band or The police code of indecent exposure?
I bet your torque wrench’s arnt exactly right, I know my torque wrench’s are cheap and over tighten a lot of my bolts. I broke a left side cover bolt and it wasn’t even at the required torque yet.
@@blakejansen642 Could be but I used the same wrench after I got a new bolt - without the oil of course. Maybe the oil makes it easier to stretch the bolt and if the wrench is off a few pounds it doesn't end well.
Is this almost the same on a 2006 crf230f?
It’s honestly not that hard to do top ends on 4 strokes.
The videos being so great helps too
Exactly
ShorelineFilms it’s really just the bottom ends that are a pain
It’s not at all , I’ll tell you it makes your life a ton easier if you just pull the engine an do it on a clean organized work bench !
Hard if your not mechanically inclined or have the tools. Lucky for me I have both :)
What is Solvant?
Solvent, like contact cleaner breaks down grime and buildup.
What kind of scour pad do you use?
We used the red Scotch-Brite pads to clean the valves and gasket surface.
@@rmatvmc thanks a lot
Do a 2016 Husky engine rebuild.
Price for whole top end???
Using punch to hold the cylinder. Can’t you just put it on a wood bench? If you have one of thoses valve punch
You can certainly put the engine on a bench.
@@rmatvmc damn you guys are on it! 2yr old video and a reply in less than 2mins wow 🤩
@@rmatvmc thank you for all you do! You guys deserve much more attention. Sucks that people nowadays are afraid of motorcycles and bunch of pussies lol. Thanks again!
Where's part 3?
ruclips.net/video/r3XryeyZr3k/видео.htmlsi=0dKAUWL-7SG5_r-w
24:59 there is fuzz on the gasket lol
top end rebuild on YZ450F seems a lot easier compared to the CR450R
the is 05 going to rip!!!
yeah i will buy a 2stroke after i put my 450 back together..
That's EXACTLY what I'm doing lol
Other than the head with valves rebuilding 4 stroke is not hard and about the same as 2 stroke.
Top de mais
Not much harder than working on a 2 stroke. Good
Fun fact: If you know how to replace 4 stroke top end you can do a 2 stroke but if you only know 2 stroke you can't do 4 stroke
Looks like a f****** nightmare . Might just get another 2 stroke
You said drink everytime he said contact cleaner,man I’m fubar.
This is making me regret buying a 250
Hey bud I have a video on my page of my trx starter problem if you could check out and let me know what you think the problem is be gladly appreciated..
And thats all there is to rebuilding your TopEnd. Lmfao
Two words……
#1………….contact cleaner
#2………….scotch brite