"Airlock" Intake & Exhaust Valves | Honda CB350 / CB360
'Airlock' Intake & Exhaust Valves | Honda CB350 / CB360

"Airlock" Intake & Exhaust Valves | Honda CB350 / CB360

Your Price: $100.00
In Stock
CMC Part Number:4033
  • Replaces OEM Part:14711-286-030, 14721-286-305, 14721-286-020,
  • Qty:Sold in Sets

Optional Add-On Parts:
Coarse and Fine Valve Grinding Compound (#9056) (+$9.00)
Prussian Blue (#9055) (+$9.00)

Part: Honda CB350 (CL350 Scrambler / SL350) &  CB360 (CL360 Scrambler / CJ360) Intake & Exhaust Valve Kit

Why You Need This: A proper top end overhaul not only involves refreshing the cylinders but going through the cylinder head and inspecting the valves, valve guides and the the whole valve train. Intake and exhaust valves do wear out with high mileage and should be replaced if they measure out of service limit or measure out of concentric alignment. 

Since original OEM Honda replacements are all but obsolete, Common Motor has stepped up the game once again and manufactured our own brand of super high quality engine valves for the  CB350 (CL350 Scrambler / SL350) &  CB360 (CL360 Scrambler / CJ360) families of bikes. We have worked diligently with one of the top OEM engine valve manufactures in the world to fabricate brand new engine valves using modern materials designed to out perform the originals.


  • Manufactured from Japanese made JIS standard SUH35 steel
  • Valves are Tufftride coated
  • Extra wide valve face to accommodate variations in worn valve seats (easier to lap)
  • Stellite #1 coated (50-58 HRC) on the tip of the valves (extra hard for the tapping of the rocker arm tips) to prevent "mushrooming"

Sold as a kit of four, with two intake and two exhaust valves. While you are replacing the valves it is also a good idea to measure the valve guides and replace if out of specification. Put it all back together with a fresh set of overhaul gaskets, intake and exhaust valve guides.

Installation Tip: Valve seats need to inspected and touched up from a machine shop if heavily pitted. Otherwise you need to lap with the new valves to the old seats. Guides must be measured for excessive play / wear. Guides will need replacement before attempting to cut or lap valve seats. Honda CL360 / CJ360 / CB360 models use valve stem seals, that should be changed when the valves are replaced if you are still using the factory style iron valve guides.

These Intake & Exhaust Valves Fit These Honda Motorcycles
5 Stars
I had nearly no idea what i was doing
Nice looking valves! I don't know much about 4 strokes, but these looked a lot straighter than the valves I took out. I have a lot of experience with small vintage 2 stroke mopeds, and some of them have decompression valves so i figured this was just a larger version of that. Boy, was i pretty much right! Lapping was pretty straight forward, probably spent about an hour and a half to two hours total doing all 4 using a drill and cup from one of the valve lapping sticks. I did use the stick a little bit just to pretend i was a cowboy lighting a fire on the range. I did not cut the seats. The motor i was working on only had 16k miles on it. I just removed the pitting and made sure the seats were even. Started with some Permatex Valve grinding/lapping compound from Autozone and finished with some 280 Grit Loctite Clover. It is hard to find lapping compound finer than the 280 for a reasonable price, but i think 280 is fine. I have never worked on an engine with valves before. I did just fine. I checked the valves for leaks by cleaning all the lapping crap off, creating a seal with my lips on the head and blowing on the valve i was lapping. You can tell when they are not sealed. Used a C-clamp and a cut socket to install the springs and keepers. It was kinda terrible and i recommend getting a proper valve spring compressor. Certainly doable though. You can see i scratched my mating surface a hair. It buffed out. Good valves! Very recommend. Made in Japan!
Did you find this helpful?  13 of 15 Found Helpful
Reviewed by: (Verified Buyer)  from Washington DC. on 7/5/2018
5 Stars
Installed in my cb350 (1969) and they work great!
Did you find this helpful?  7 of 9 Found Helpful
Reviewed by:  from Virginia. on 9/21/2015
5 Stars
Great replacements
Had a bent valve due to cam chain guide installation mishap. Replaced the bent valve and now she runs like a champ
Did you find this helpful?  3 of 5 Found Helpful
Reviewed by:  from Mankato. on 9/13/2017
5 Stars
Brand New Vanilla Valves
Nothing fancy, just new & great to replace once you have to top end of your 350 twin cracked open. Came on time, as I ordered them. Had my local shop do the lapping, have had 0 issues since(3k miles). Hopefully they last a good long time.
Did you find this helpful?  2 of 2 Found Helpful
Reviewed by:  from Austin, TX. on 8/17/2017
5 Stars
good valves worked fine thanks.
Did you find this helpful? 
Reviewed by: (Verified Buyer)  from leitchfield. on 12/24/2019

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