CB750 Nighthawk: Valve Cover Gasket Replacement
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- Опубликовано: 17 сен 2024
- Here I demonstrate how to replace the pesky 90's CB750 valve cover gasket. You may start seeing oil seeping around this gasket and if it's not taken care of soon, the oil will begin to burn unto your pretty engine, causing discoloration. Be sure to stick to the end when I give one of the most important tips.
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I also have a 93 CB750 and have been avoiding this. You made it look easy. Thanks for posting!
Just Got an early 90's nighthawk. these videos are saving my life
just bought this bike as my first bike. this will be the first time opening up an engine, thanks for telling me not to be afraid lmao
This is exactly what I was looking for, thank you Cody!
Followed procedure in the Clymer manual 1st time I replaced the gasket at about 30 or 40K. Now has 135,000 mi and in need of replacement, so I guess I'll follow what worked for me the first time. Nice to see the procedure actually done without relying on fuzzy black and white photos in the Clymer.. Thanks for the vid.
as a CB750 Nighthawk owner who is struggling to get it tuned, you got my sub...
Bought an 82' CB750SC nighthawk. This video was simple and easy to follow. Just gotta order parts for mine and tackle the job. Thanks motorcycle MD
Did this work on the 82?
Thank you for posting this helpful video. Did this job successfully on my 1997 CBSevenFifty (Australia spec) last night. I watched this months ago and gradually got all the gear together to do the job. I followed your advice all the way, used Honda gaskets, Hondabond HT, and carefully cleaned the mating surfaces. It was a cold night last night and the sealer was nice and tacky which help locate the gasket in the correct position to drop on the valve cover. Thanks again 👍🏻👍🏻
I really couldn’t have asked for a better guide to this task. All manuals say take engine out, in very happy to CLEARLY see that’s not needed. Very easy to follow. Very much appreciated!! I have a 01 nighthawk. So I found this VERY helpful. I look forward to watching more of your guides
love the cb750 nighthawk owned a 1992 750 tough as nails. it could have used more power but as a daily rider a great machine. all it needed was gas, oil, brakes, chain and sprockets and it would run for ever. again another great video.
+acerider2005 EXACTLY why it is one of my favorite bikes to date!
Best tutorial video I’ve seen in a while, you covered everything in perfect detail!
This video is a gem!
Awesome video! No nonsense, straight to the point mechanic. Thanks a ton!
+Peter H. Wong 🤙🤘
Thanks for making all these videos for this older bike! 95 CB750 is my first bike I bought earlier this summer and your videos are life savers dude!!! Im cheap and not going to a garage unless I gotta
Im in automotive industry and our teachings are a bit diffrent. We also are taught to only put gasket sealant on 90 degree edges also not half circles. Rtv gasket sealant being applied to the metal surface that already has rubber formed ridge will release the vaccume that the gasket creates. Its all good man diffrent strokes for diffrent folks lol. I enjoy watching your work brosef!
Cody - second attempt I used gasket cement with my new gasket, as yes those areas do leak -
So hard to find anything on these types of bikes! Subscribed! Thank you!
+Tim.Bean 🤙🤙
Just by watching this video I am inspired to this on my 93 750. Its been to long a seeping
Did 2 valve cover gaskets on my ZX10R, the 2nd time it leaked I was wondering if I was doing something wrong, had NO idea you were supposed to use gasket maker on the cam nub bits of the gasket. Letting it cure overnight hopefully no leak tomorrow!
Nice to find you, I have a 1993 Nighthawk 750. Didn't need this, thank God but still learned what to do! Good to know I know where to go if I need help!
Great video. Comes in very handy as I own the very same bike.
Antonio Perez 🔧🔧👊🤙
Great job Cody. Thank you for sharing your knowledge with everyone. Your videos are always so clear in all respects. Keep up the good work.
Thank you, Cody, for another great video learn a lot. I also have a 93 CB750 with 15,000 miles mines is starting to seep out a little.
keep us the great work. I enjoy your videos and your tips. thanks again
Deadly vid man, i Just went through this and your help makes me feel like I actually did it right lol...Thanks a gain!!
thank you good teaching very helpfull
The shop manual says to put the gasket on the valve cover before putting it back in. As long as you use something that will make the gasket adhere to the cover for about 30 seconds, that is easier I think than the way you did it.
+Robert Brandywine What ever works for you brother. I like doing it the way I am confident with!
Robert How to adjust the valves on a 2005 15 Honda rebel 250 how do I adjust my rocker arms on a 2015 Honda rebel 250 I would like to know how to adjust the valves on a Honda 250 rebe
Thank you
Planning on replacing mine next weekend, great video!
Hey Cody , Already a Subscriber and go to your vids regularly when working on the horses in the stable . I would let you work on any of my bikes anytime . . . . and if i am not working on them myself, then i am VERY fussy as to who i have doing any work on them . Keep the vids coming man ,Great stuff .
Cool man. I have an 82 that needs this. I'm looking to find info on speedo cable for it too
Hey Cody
Followed all the steps
Any advice how to get a broken valve cover bolt out
Thx
Darren
Cody man, you're f*cking awesome! I've been trying to find videos for my 2000 cb750 (got it used but just passed 10k miles) and came across your channel. I was hesitant to work on it since I'm not too familiar with the mechanics of a motorcycle but with your videos and a free owners manual I found online (SCORE!) I'm ready! Haha, changed the plugs, I think I'll clean the carbs next since it still has issues starting if the choke isn't on. But I noticed some oil leaking by the half Moon area of the gasket so this video is PERFECT! I'd buy ya a beer if I could!
I downloaded that same pdf manual and took it to a kinkos style store and printed it out and hole punched it into a binder. The image quality on that PDF is surprisingly high and blew the images up pretty big. Very useful
Did you do this and did it workout ok? Just wondering since I'm an amateur on bike repair.
@@Buddycoop1 yessir! The carb cleaning did it for me. Followed exactly how the videos went. Be sure to stay organized in whatever you do. A lot of small pieces. Have a box, containers, magnets, napkins, take pictures before you disassemble. Organization is key and with Cody and the manuals, you're golden. Don't be scared!
@@humaniz2466 Thanks! Appreciate the reply.
Identical bike with the same issue, thanks for the video man
Thanks Cody
Just bought a 1993 nighthawk 750. Needs some love Till shes back to jer youthful self but in well on ky way to getting her right.
She hesitates when I give her throttle. Rode her 135 miles home from seller and she is responding much better after the ride so i think some basic maintennece is in order.
That helped me a lot thank you so much saved me lots of time and stress
Nice video man .. i got the 1996 -750
awsome video sir!!
This is exactly what I was looking for also, great video.
Another great, helpful, useful video. Nice job!
Excellent job!! Very well done! Thank you.
NICE video man, I ll do the same on my Yamaha XJR soon
nice job, man, u rock!!!!
Great!! Would be great if you can post a video for nighthawk 750 slipping clutch repair. Thanks
Good vid man
Great video!
Hey Cody, great vid. very helpful!
Hey Cody, love your show very knowledgeable information.. You have any of those bikes for sale?
Thank you man!
i like this video, keep it up man really good and educational
Great tutorial. Thank you!
Awesome video. Thanks
Exactly what I was looking for. Do you have a link to the bolt gaskets??? I've found OEM and aftermarket cover gaskets but have a hard time finding the 8 bolt gaskets (from a reputable website). Woukd like to get everything shipped here this week so I can be back to riding in the north Georgia mountains by the weekend.
Thanks for the help!
I like it was very good lesson.
+Gilberto Benavides Hope it helps you one day!
I just got a 1981 cb 750f for 300 bucks < it came with a pack full of these gaskets and a full carb kit in packages
Is it really necessary to put on sealant?
Thanks a million...!!!
I would advise to chemical clean the valve cover. Scraping on an aluminum part can result in micro pitting and could cause seepage. Just food for thought.
Very nice thanks for your time doing this vid I really appreciate it 👍🏻👍🏻👍🏻very helpful 👌
Thank you 😎
Hey what's up dude, I was just looking though RUclips and came across your videos. I just bought a 84 Honda nighthawk 700S. Needs a lot of work. So when I came across your videos I had to subscribe. Watched 2 videos already and I'm quite please with what you are doing with all the help for D.I.Y.errs like myself and everybody watching your videos . I do have a question if you don't mind, can the clutch reservoir be rebuilt as well. reason why I'm asking is when I pull the clutch there is no kick back. So on top of rebuilding the slave can the reservoir be rebuilt to ? great videos you ROCK Thanks in Advance.
Hey Cody, i found this video while looking for answers as to why my 1996 NH #3 exhaust pipe is smoking (white) with decel popping. manual says it could be a valve seal or a piston ring. started happening after i overfilled with oil. since drained and has right amount now. just wondering if you had any ideas on what i should tackle? thanks for the helpful vids!
loving your videos man!
This is super encouraging to hear brother thank you!
Great vid Cody. Would you have to take the engine out to change the cylinder gasket?
Thanks
I enjoyed the video and it was very detailed. I have an 85 CB700 Nighthawk and it looks almost mechanically identical. Gasket is identical at least. Anyone tell me if the sequence is the same. It seems so
good job really great......thanks buddy
+Heaven Walker Your very welcome! 🤙
Hello Cody! Is it necessary to work with a sealant? Or does the manufacturer recommend it? Or is this your personal experience already?
Great video!)
Сергей Киселев Hey! I feel it is a necessity definitely around the half moon ends. I use it in small locations elsewhere to help keep the gasket in place!
Thanks!I will do the same)
My 1985 Honda Nighthawk engine is running hot( causing starter and alternator to be hot to the touch after riding just a few blocks also) and also smoking a bit from the left exhaust pipe. I also have a small oil leak somewhere I just haven't narrowed it down yet. Could it possibility be the head gasket? Note: I am not mechanical incline but just reading a bunch and learning.
Ok off topic here bro where you got that seat looks very nice
Great video, I'm planning to buy CB750. Any tip what to check this classic motor?
Do you have a video about setting valve clearances on a 2007 Honda Shadow spirit
That's a thumbs up video but why did you open valve cover? you haven't adjust the valves and I couldn't see any leaking ??
No need to do a valve adjustment their hydraulic automatic valves
Many thanks for posting this. My 1991 Nighthawk 750 with 29k miles just started leaking even though I keep in garage year round and ride year round.
A few questions if you don't mind.
1. Should you disconnect battery before disconnecting coils?
2. Video doesn't show you applying Hondabond HT on half moons like you said you would. Did you?
3. 15:08 you say to apply "RTV" to hold gasket down. Did you mean to say Hondabond HT?
4. Total time from start to finish?
5. Total cost of parts?
1. I did not disconnect the battery because you are not disconnecting any constant hot wires to accidentally ground to do this job.
2. At 13.42 if you look at the video there is sealant on the "half moons" like I said I would do. I just didn't see the purpose of showing you how I applied the Hondabond.
3. Hondabond HT is what I use for everything that requires it's application. Any HIGH TEMP RTV will give you the same results and is almost exactly the same thing but hondabond being more expensive, you can go with what ever you can afford just so long as it is resistant to high heat temperatures.
4. For me it takes about a solid hour.
5. Total cost for gasket and sealing washers is about 95$ with whichever Hightemp sealant you choose.
Much appreciated!
Just did mine. Took me 2 hrs 50 minutes. I removed the ignition coils (2 bolts) and hung them and their attached plug wires toward the front to maximize room above the valve cover. Cleaning the gasket channel in the cover took about an hour because I'd clean, rinse and see spots I'd missed. I used a small screwdriver to scrape it out.
I had to put RTV in the gasket channel to keep the new gasket from falling out when maneuvering cover back into place.
Auto supply stores carry only red RTV for $8. It almost matches my red Nighthawk. ;-) RTV says wait 24 hours before running engine. Fingers crossed. (Update from next day: I took bike for a long ride. Success! No more leak!)
I bought new gasket and 8 washers online for $65 + $14 shipping.
www.hondapartsnation.com/oemparts/a/hon/506cac12f870023420a403fd/cylinder-head-cover
6:00 Those allen sockets make hex head removal so much easier than standard allen wrenches. You get more bite and more torque. Harbor Freight sells them. They are worth having.
Please Help! at 03:54 you mention putting white on the coil box to identify the cables, like an idiot though, I pulled out my 1 and 2 by accident and I hope I put it back correctly if I start up will I hear a misfire and then just have to swap them? Any advice would be highly appreciated.
I did this job twice now, following this video -- first time, it still leaked (I used a super thin smear of honda bond, and I think under-tightened the bolts. Also, I didn't replace the rubber half-moons). This time, I used more hondabond and replaced the half-moons -- I'm scared that I used too much. How concerned should I be about a tiny bit of squeeze-out when I tightened the cover back on -- I'm afraid to start it back up and get hondabond flakes in the oil passages :( but I think I'm over-worrying.
I have a 1996 and am waiting for the bolt seals to arrive. I did spend $75 bucks to polish the valve cover and now the rest of the bike is going to look like S%^&t. Anyway, manual says to use gascanich on the top of the gasket so I am curious why you did not do that? Also, it is apparent that slipping the cover in with the gasket installed could be a chore. I may do it the opposite as well. Thanks for the vid.
While I've got the bike apart this much, what would some other good things be to address, clean, replace, etc. Mine is a 2003 with 25000 miles on it.
Hey Cody I just replace my head cover gasket on a 86 Yamaha radian butt now the motorcycle when I turn it on revs up like crazy automatically
Is there a way to check the tensioner condition or replace it at the same time?
Cody, I currently own a 1991 Honda Nighthawk 750. However, about a year ago it fell on it's side during transport on a Kendon Trailer. Do you know of anyone or business that can remove a dent and then repaint the tank because the original paint was cracked during the fall. Thanks.
Cody,
Does the bike need to be prepped? I mean like empty the fluids? Thanks.
+Savage6FlyingTigers what I show in the video is exactly what needs to be done!
Duuuude. Thank you so much!!
Where would I be able to find a valve gasket cover for a 1989 Honda hawk, if you don’t mind me asking
Do you know if those gaskets also fit a 1986 700s??
Hi Cody great video where do i can find the same set of gaskets for my motorcycle italiano a honda 650 nightwhak from 1983 thankyou so very much
did you ever find a source for the gaskets? I have the same bike as you and can't seem to find it
TheMotorcycleMD what do you recommend for getting old gunked up gasket that fused to the head of the motor mating surface? If I use sandpaper what do you recommend using and should I worry if any little pieces that I sand happen to fall into the motor? Thanks
Bryan Stocklas Green Scotch-bright scrub pads work great, if you use sandpaper just don't go crazy with the grit. Use a paper that won't put gouges in the mating surface and work is smooth.
Easiest and safest is get an exacto knife and kinda cut it off then brush off or grab the slivers that come off
Plastic razor blade works great.
Saw small leak on my bike, I ordered gaskets for my bike. Does it need glue? If yes what kind?
I have a Ninja 500 and just rebuild the entire engine it blew a rod bearing so I put a used crankshaft with rods... so I was driving it the other day and I let it sit a went to start it and it will crank over normal but right when it is about to start the starter slows down and can barely turn over the engine..what could this possibly be, please help
Can i use permatex motoseal?
Cody, am looking for cbx750 rc17-e crankshaft main bearings. Any leads. Thanks
How do you put the new rubber gasket bolt?
It is the same gasket for 650?
What is the effect that a bad gasket would have on the bike? I currently have one that is leaking and it also seems that one of my cylinders is misfiring. Could this be due to the gasket?
Thanks in advance.
Bad gasket means oil leaks. This video pertains to the top end of the motorcycle so no effect on backfiring. Could you need a tune up?
Hey Cody, I have this exact model and I am hearing a ticking coming from the top end of my engine. Any advice??
Normally it is the HVA system being noisy, try swapping the oil you have in there with something different! 10w40 gn4 works good!
Thanks!!
The oil pumps for this 750 is bit weak, try checking the oil pressure first.
Hi how much torture you use?
Hey Cody! It's been over a year since I did this on my 1991 Nighthawk 750 (see my comments from 2017) and still no leaks. Thanks again!
Recently I was getting some backfiring and decreased gas mileage so i ran some Seafoam for about 20 minutes. Engine got very hot. I revved engine a few times and suddenly it started making a loud tapping noise, seems to be coming from exhaust valve. Immediately shut engine off and let cool overnight. Next day started and noise remains. Any ideas?
I removed valve cover and ran engine a few seconds and noise is definitely coming from #2 cylinder's exhaust tappet area. I can't think what else in that location would cause the noise other than bad tappet, can you?
Update: Upon closer examination I see that one of the exhaust valves on the #1 cylinder is stuck open. (The rocker is not on the cam lobe but I can see about an 1/8" gap between the rocker and the cam, and the valve stem is lower than the others.) I'm confused because the noise was coming from the #2 valve area. So now I think the #2 tappets are ok but the #1 valve is stuck open. Any tips on unsticking the valve without going through hassle of disassembling engine to get at valve? I would think the Seafoam would've cleaned everything and made things less sticky, not more sticky.
To clarify, the valve still opens when cam lobe pushes on the rocker but does not close all the way. So the valve does move.
I know its old video but using flat screwdriver to remove debris is bad idea.Risk of damaging soft cover.Use carb cleaner or paint thinner and gentle pad.
Cody,
It's hard to find Honda Bond HT in northeast Illlinois. Can you suggest a substitute?
Permatex makes a great product.
Just be sure it is a High-temp silicon.
If they have a High-temp that is oil resistant than that's even better!
You are not using too much of it so any high-temp will serve its purpose.
I have a 1984 Honda Nighthawk 700s. I have had no luck in finding a cylinder head cover gasket for this bike. The one that you just replaced looks like it would work on my bike. Is there any difference? Is there an aftermarket gasket that you recommend if one exists? My bike is in great shape and I want to keep it that way. Any advice is appreciated.
The gasket I replaced is actually a valve cover gasket. A cylinder head gasket is a whole different animal. They are not interchangeable as far as know. That’s the issue with bikes that old! Finding parts you need!
Got it. Sorry for the mix up. It is the head cover gasket that I was asking about, the one that has the half moon tabs. Do you know where I can find a new one? The original one that I have is in good shape and I have already reinstalled it after I cleaned and polished the head cover. I followed you directions so wish me luck.
Get the part number for your model. Look at newer models parts numbers. Chances are they might be the same. This bikes was produced for many years with minor changes.