Valve adjustment (kz400)
- treitz
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Valve adjustment (kz400)
27 Mar 2013 23:09
Trying to adjust my valves. But not sure what I'm looking for.
Is the gap below the little arm that holds that holds the valve what I'm looking at? If so, I'm WAY of. It's suppose to be around .20mm but its closer to 1/4".
Is the gap below the little arm that holds that holds the valve what I'm looking at? If so, I'm WAY of. It's suppose to be around .20mm but its closer to 1/4".
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- Nebr_Rex
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Re: Valve adjustment (kz400)
27 Mar 2013 23:38
Feeler gauge goes between the top of the valve and the little stud that the nut is on.
Use .004 - .005
I'm lazy, I just back the stud with a screw driver off by 1/4 turn and call it good.
It's not exact, but close to factory specs.
Fighting to get even the bent feeler gauges in positition can be aggravating.
.
Use .004 - .005
I'm lazy, I just back the stud with a screw driver off by 1/4 turn and call it good.
It's not exact, but close to factory specs.
Fighting to get even the bent feeler gauges in positition can be aggravating.
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
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81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
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- treitz
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Re: Valve adjustment (kz400)
27 Mar 2013 23:47
That's encouraging. I was a little worried. Lol.
So you're measuring from the top of the nut to the top of the threaded piece where the flathead goes?
So you're measuring from the top of the nut to the top of the threaded piece where the flathead goes?
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- Nebr_Rex
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Re: Valve adjustment (kz400)
27 Mar 2013 23:53
No,underneath the rocker arm.
The stud goes all the way thru to touch the top of the valve.
.
The stud goes all the way thru to touch the top of the valve.
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
.
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
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- treitz
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Re: Valve adjustment (kz400)
28 Mar 2013 00:17
Super confused. The gap below the rocker arm is about 1/4".
Should it be seated/tight? Or should the rocker arm move up and down freely?
Should it be seated/tight? Or should the rocker arm move up and down freely?
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- Nebr_Rex
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Re: Valve adjustment (kz400)
28 Mar 2013 08:26
Lash is measured between the valve and the stud.
The rocker will move up and down .004-.005.
The rocker will move up and down .004-.005.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
.
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
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- Motor Head
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Re: Valve adjustment (kz400)
28 Mar 2013 09:14
I hope you have a service manual for your bike, the Factory one is best. There are copies available foe download on the net. Do a Google search and you will find one.
The motor needs to be set onto the compression stroke, with the Top Dead Center "T" mark aligned. Then both the intake and exhaust valves can be adjusted. As already posted the measurement with the feeler gauge is done under the rocker arm stud, at the contact of the valve stem. If you actually have 1/4" of clearance instead of .004" there is a problem. You probably have a worn cam lobe or rocker arm. You would have been hearing a bunch of noise coming from the cylinder head area. Adjusting the clearance will set the valve lash, but do nothing for a worn part. You may need to pull the valve cover and have a look to see whats worn. That is IF you really have such large clearance.
The motor needs to be set onto the compression stroke, with the Top Dead Center "T" mark aligned. Then both the intake and exhaust valves can be adjusted. As already posted the measurement with the feeler gauge is done under the rocker arm stud, at the contact of the valve stem. If you actually have 1/4" of clearance instead of .004" there is a problem. You probably have a worn cam lobe or rocker arm. You would have been hearing a bunch of noise coming from the cylinder head area. Adjusting the clearance will set the valve lash, but do nothing for a worn part. You may need to pull the valve cover and have a look to see whats worn. That is IF you really have such large clearance.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
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- treitz
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Re: Valve adjustment (kz400)
28 Mar 2013 13:00
I do have the manual.
After doing a bit more research it appears I am not measuring correctly. I guess the top of the valve, underneath the rocker arm is harder to see than I thought it would be. And I can't even get my feeler gauge in there to measure it. I may just have a professional check it.
After doing a bit more research it appears I am not measuring correctly. I guess the top of the valve, underneath the rocker arm is harder to see than I thought it would be. And I can't even get my feeler gauge in there to measure it. I may just have a professional check it.
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- Patton
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Re: Valve adjustment (kz400)
28 Mar 2013 15:21
See these sites for more good info:
kz400.com/
www.armbell.com/forum/index.php?mforum=kz400
Good Fortune!
kz400.com/
www.armbell.com/forum/index.php?mforum=kz400
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
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