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Kz650 valve stem seal replacement
- gbot9000
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The bike only has ~10,000 miles on it so im hoping its not the guides..
Maybe needs viton stem seals?
Compression check showed
#1-114 #2-110 #3-110 #4-111
Left spark plug, how i got it. Right spark plug, after ~100miles.
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Also what level do you rate changing valve stem seals as far as DIY?
This is my first bike and never worked on a motorcycle before except changed oil and spark plug . I am quite handy and have found some people using the "rope trick" so they do not have to take off the head. What tools would i need? Valve keeper? www.amazon.com/gp/aw/d/B0012S61IO/ref=mp...22554&sr=8-2&pi=SL75
79 kz650
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- bountyhunter
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Be sure to get VITON seals. The butyl rubber seals do fail, my bike is on it's third set (seem to last about ten years). Vitons are much better.
FYI: I bought a set of valve guides to use when I did my rebuild at 75k miles and the guides all measured like new. Still have the new guides available at a discount.....
1979 KZ-750 Twin
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- wireman
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posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.
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- 650ed
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wireman wrote: Yeah if they will be able to actually replace all the seals in 2 hrs from start/finish Id pay to buy a ticket and watch these guys work.
Good point; they should make a video.
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- turboking
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I see your running ngk b-7 (hotter) to keep from oil fouling? :blink: . the 650 can use ngk b7es :evil: or ngk b8es (standard plug) like the big fours I thought :huh: .
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- wireman
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- gbot9000
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I found these, should work.
item.mobileweb.ebay.com/viewitem?itemId=230759695057
So he really wouldnt be able tell if the guides are worn when he changes the seals?
I guess if the problem persists after the new seals are in then its probably the guides.
79 kz650
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- gbot9000
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turboking wrote: sounds like a "quick and dirty" with no head removal. At $140 if he's r&r the head ,it's a steal.
I see your running ngk b-7 (hotter) to keep from oil fouling? :blink: . the 650 can use ngk b7es :evil: or ngk b8es (standard plug) like the big fours I thought :huh: .
They are the b7es.
79 kz650
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- 650ed
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gbot9000 wrote:
turboking wrote: sounds like a "quick and dirty" with no head removal. At $140 if he's r&r the head ,it's a steal.
I see your running ngk b-7 (hotter) to keep from oil fouling? :blink: . the 650 can use ngk b7es :evil: or ngk b8es (standard plug) like the big fours I thought :huh: .
They are the b7es.
B7ES is the correct heat range for normal riding. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- APE Jay
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The motor has not been "gone through" if the head has just been washed up and valves lapped.
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- Motor Head
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The stem seals can be changed with the Head On, but you sound as per compression #'s and the plug reading that you need to look further.
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