Honda CB500/550 Valve stem seals and valve lapping
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- เผยแพร่เมื่อ 5 พ.ย. 2020
- Hope you guys enjoyed this one. Link to step by step video on engine teardown and tools below.
Step by step engine teardown: • Honda CB550 top end ga...
Valve spring compressor: amzn.to/3n3HQwn
Valve grinding compound: amzn.to/3n0Ukow
Valve holding tool: amzn.to/2U1J0Mi
Other parts and tools: www.amazon.com/shop/influence...
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No need to worry about the helmet mic on the test ride. It was a joy just to hear that engine!
Love your work, thanks Taylor.
man! how smooth sounds that engine, amazing
Great video, from diagnosis to solution. Thanks for showing stuff in detail, including the valve lapping.
Nice slick bike. If you dont have a valve lapping tool, or have a lot of valves to do:
- mount the valve lap tool or suction cup in a drill. Clockwise a few turn, counter clockwise a few turns, SLOWLY.
- Use a short piece of rubber tube in a drill, put rubber tube over top of valve stem. Same as above with the slow rotations, push on valve with greased rounded "soft" object (thumb, back of screwdriver etc) from combustion chamber side to apply slight pressure.
Stay gold.
Perfect timing as I JUST got a complete set of new valves/springs/seats in the mail 2 days ago for my '71 CB500 rebuild. Wonderfully comprehensive video as always.
These detailed videos are great. I'm rebuilding a 72 CB500 now and these videos are the best step-by-step I've found. Thank you!
In the point of my ls650 engine build where I need to lap the valves. This video was super helpful!
Thanks for posting. As a newbie I always enjoy seeing the inner workings of these engines. It helps me learn how everything works. The opening part of the video about diagnosing exhaust smoke was also helpful.
Thanks for watching!
OH how i love videos like this , thank you Taylor for sharing your knowledge with us !
Glad you like them!
Nice work. I have always referred to the half moons as collets.
Love it! putting together a cb500 1974 because watching your videos!
Extremely helpful information. Applicable to other CB models as well.
Great vid, straight forward and helpful. Thank you for making it
Thanks for the great how-to video.
Taylor. I don’t know if you realise what a talent you have mate. I struggle to do the simplest things on my bikes, and usually make a mess of them. It truly is a gift. Love your channel
Thanks Kevin!
Doing this soon . However I was very fortunate to be given by a colleague who collects tools ..and gave me a valve spring compressor that has the clamp /handle . Very ideal set adjustment and simply squeeze handle to compress spring . Good video however top man
I'm assembling an XJ650 head unit, was sweating a bit removing the stem seals as they were on pretty tight - they've probably been there since 1980. Used bent nose pliers to get under the steel casing and they popped off without too much trouble.
Spannering done properly, and the bike sounds awesome 👍
Thanks 👍
Looked like a perfect day for a ride!
Too cold up here, envious!
great video! technical stuff is always welcome
Thanks
That bike sounds so good Taylor and looks fantastic, love the fuel tank, keep up the good work mate ....👌👍😁🇬🇧
Thanks 👍
Great videos. Wonder if you tested the valves for leaks AFTER you lapped and reinstalled ? Keep up the good work ....
Nice looking bike, I like the tank colour choice & the decal.
Thanks 👍
Great video on the stem seal/valve lapping process, well done again. Would you be able to drop me a link to where you got the tachometer on this bike? I put a similar size on on my 550 but the ‘ratio’ is wrong as it is for a 750 consequently it doesn’t read the rpm’s correctly. I’d love to replace with one that reads right
Nice job Ty!
On many engine types you can just about change the stem seals with the head in place, doing it one cyl at a time with that piston at tdc so as not to drop the valve into the bore...You would need a different type of spring compressor of course.
I did it that way on my SBC. Haven't done it on a bike like that because I take the opportunity to lap the valves as well.
I recommend a stem to guide check using a dial indicator :)
14:50 There is a detail that you did not mentioned regarding the outer valve spring. There is an orientation for them, being the closer gap coil towards the head. Some service manuals does not mention that either. If the right orientation it's neglected, valve opening and closing timing, will be affected at high revs.
Great sounding and looking bike.
Thanks!
How did you paint your motor it looks great thanks in advance...
Great video, super detailed. Would you please list the torque specs on the head? Thank you!!
Wow....what a test ride.
Well done. Nice bike. I’d love a 550 to work on myself. Thanks for the videos!
My cb750 does not sound like that... I am going broke buying all the tools to follow you vids. But I do love my munit blue and the full rewire went well...so far no issues other than a stutter in low rpm range. Not ready for top end rebuild.
im rebuilding a cb750 top end. waiting on mail parts at the moment. its honestly not bad at all. take your time and things are almost impossible to mess up
Thank you.
God damn you do amazing work!
happy november
Great basic description of an engine.
When the pair of valves (inlet /outlet ) are lapped and reassembled with the springs is there anyway that they can be tested physically ? Maybe very light oil in the valve head recess?
You could put a set of old spark plugs in and then a little paraffin into the upturned head recesses and wait to see if it finds a way through.
I turn the head over, put the plugs in, and fill the chambers up to the gasket surface with mineral spirits solvent. Wait about 4 hours and check how much if any has leaked out past the valves. On a fresh lapped valve job - no leaks should occur. (mineral spirits work as well as diesel / paraffin / kerosene).
Warning: Technical video... I'm like heck yeah bring it on.
Great job! Do you have any tips to clean the combustion chamber from carbon deposits?
Solvent and a scotch brite pad
Awesome!
Great job, man! I was checking out the speedo and tach during the test ride. What speedo and tach do you use?
These are both from Dime City Cycles
Very nice!
Thanks!
You are the Hattori Hanzo of the old's Honda rebuild ...
Hey Taylor quick question, my bikes open header with velocity stacks, runs super well, but on idle it’s pig rich, how many turns did you back out the mixture screw on these carbs? I have a pair of 76 carbs on a 78 motor, thanks for the help!
That bike sounds fucking mental, I love it.
If you are replacing valve stem seals. Do you recommend lapping every valve?
Ps your videos are killer. They are helping out tremendously.
Wouldn't hurt while you're in there.
Do you will "sclamberize" the KLR? Any big changes or chops?
Hey, thx for the tips!
Do you have to grind the valves when they are brand new? Thx in advance
Not a bad idea to do it on new valves as well. It will make sure you have a perfect fit.
Do you recommend driving a 1975 Honda cb550 cafe racer on the freeway?
Assembly lube on the new seals?
I noticed you have what appears to be a CB750 in the background. Mine is 1979 750f dohc and I believe I have bent valves after the timing chain slipped. is there a way to remove the head without taking the engine out of the frame?
Hey do you have a link to the valve stem seals or what kind you used. I'm currently doing this job I was also looking for new valves as well do you recommend a specific brand of valve?
How do you put the tappet cover on. I put my tappet cover on my 550 and it stopped the pistons moving ?
Taylor I’m looking for a head gasket for my 1989 Honda GB500. Got any suggestions? tia
Boa noite abrir o motor da minha cb500 74 quero umas dicas .Brasil
..put a dab of Grease with your Finger in that Slot, put your Keepers On, & the Grease Will Hold the Keepers while you release..also, they make a Lever Type compressor that Works Easier..
One of my valves doesn't slide as smooth as the other 7 valves. Its not tight, just not super smooth. It'ss not bent thankfully. Any ideas. Is it and the guide still ok to use?
Why couldn't it be piston rings as well? Couldn't it suck oil through a defect ring?
If it was piston rings as well, he would have got blue smoke from the exhaust while accelerating.
What ever happened to the Triumph build?
On the back burner for now while I finish customer bikes.
topping stuff
Keepers? I call them collets
Me too !
🇬🇧?
we all call them collets
Me too
referred to as collets in UK, keepers in US I think. Just like steering stem/ triple tree or bonnet/ hood.....
my bike smokes on cold start usually. Doesn't this point to valve stem seals to ?
Yes especially if it goes away once the engine warms up and the seals expand a little.
My frame is not arched like your cb500 frame so I may be forced to remove the engine.
That bike sounds great. What is that old wagon across the street? Volvo?
Great video Taylor! I need to do the head gasket on my 74 CB550 (it’s weeping a little oil when I ride it on the highway). Might get you to do it for me since I live close to you. What’s the best way to get in touch with you?
ClassicOctane@gmail.com is the best way.
When this young mechanic installed the valve seals, it seems he forgot to lube the valve stem or mention doing so, don't install seals dry or they may fail prematurely
Yes that's important
Man she roarz nice lovely
I don't want to be a bore but you started it with technical talk.... at the start of the vid about 2 mins in you said air is "sucked" into the engine.. tut tut.. Sucked is not an engineering term. The piston moving down the cylinder causes low pressure in the cylinder then atmospheric pressure out side of the cylinder pushes air through the carb collecting fuel on the way.... When I was at collage if you said "sucked" a board rubber would by flying through the air in your direction! Keep up the good work.
I've got a 74 cb550 in atx. Wanna go ride?
I would love to set up a subscriber ride sometime.
I thought you weren't supposed to lift and reposition the valve with that type of compound. That particular compound is a multi-level grit compound that gets finer as it is used, and lifting introduces the ground crap and larger particles.
Great video otherwise, the bike is sick
500 to 700 dollar motorcyle and some work