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Author Topic: 79 CB650 Valve Cover Gasket  (Read 355 times)

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Offline jsmith800

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79 CB650 Valve Cover Gasket
« on: January 16, 2024, 09:54:41 AM »
Hi all, trying to install the valve cover gasket (long crazy spaghetti shaped gasket) and it keeps slipping out at different spots when trying to install it in the valve cover. any suggestions. i've warmed up the gasket in water but still feel like its too small or something. i've even taped it in with duct tape but when i slowly remove the tape it pops out again.

its called GASKET, CYLINDER HEADCOVER 12391-426-00

it came as part of a gasket kit i purchased from ebay. I'm guessing a crappy Chinese knockoff that not correct.

really getting frustrated.
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Offline bryanj

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Re: 79 CB650 Valve Cover Gasket
« Reply #1 on: January 16, 2024, 10:36:17 AM »
Grease or contact adhesive in the groove, try doing a cbx 1000 one!
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline M 750K6

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Re: 79 CB650 Valve Cover Gasket
« Reply #2 on: January 16, 2024, 02:31:47 PM »
I use grease to position any tricky gaskets. Only a thin smear..
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Offline newday777

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Re: 79 CB650 Valve Cover Gasket
« Reply #3 on: January 16, 2024, 04:18:08 PM »
Is it a flat paper gasket or an oring?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline jsmith800

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Re: 79 CB650 Valve Cover Gasket
« Reply #4 on: January 16, 2024, 05:11:34 PM »
thank you bryanj.  contact cement worked great!  kind of rubbery so i'm sure gets smushed in there nicely when i torqued it down.

the gasket is a rubbery round vinyl feeling gasket....very difficult to install (think mine was fabricated too short)

heres a picture of it completed.  the engine was vapor honed if it looks too clean..ha..ha..
« Last Edit: January 16, 2024, 05:13:14 PM by jsmith800 »
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