Valve Rockers Don't Line Up with Valves?!

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Mr. Minecraft

Mr. Minecraft

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Jan 13, 2012
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I was setting the clearances on my valves when i noticed that the rockers don't line up with the center of the valve stems.

:-||

The picture explains it all:

 
GearNut

GearNut

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Aug 19, 2009
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While it is common for the rockers to be engineered to be a little bit off center of the valve stem (makes the valve rotate for a longer service life), the amount of offset you have is alarming!
What engine is that?
 
GearNut

GearNut

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Aug 19, 2009
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I have not had the need to adjust the valves in my HuaSheng yet so I cannot comment if your rockers are placed similar to mine.
Perhaps scotto- or MotorBicycleRacing or someone who is more knowledgeable with the HuaShengs will see this thread and be of more help.
I am sorry I am not... yet.
 
MotorBicycleRacing

MotorBicycleRacing

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Jul 28, 2010
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Mr. Minecraft said:
I was setting the clearances on my valves when i noticed that the rockers don't line up with the center of the valve stems.
Click to expand...
that is really off center!

Did you try rotating the springs, maybe your valves are bent?
There is a little bit of side to side play on the rockers.....

Both of my Honda"s and my Huasheng line up.
Sorry too lazy to take a pic and the finish on
the Honda rockers and casting make the Huasheng
look like they were chiseled by a caveman! :D
 
wayne z

wayne z

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Dec 5, 2010
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Are there any shims on the shaft, next to the rockers that can be re-arranged? If not, you might try removing metal from the rockers on one side, or from the shaft stantions, and add shim washers.

Might try changing the rockers around just to see if they fit better that way.

But it might run fine like it is for a long time.
 
tooljunkie

tooljunkie

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Apr 4, 2012
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dont bend the rockers,you are looking to break the castings they are mounted to.
as mentioned above ,file a little off the rocker and shim it over.
i would swap them before filing ,though.
 
wayne z

wayne z

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If you have access to an aceteylene torch, you would prolly be OK heating the arm's end to dull red and then bending them some, and let then air cool a couple munites before quenching with water .
If they have bronze bushings you will have to use the heat carefully and quickly, and maybe quench with water after a munite or so, or remove the bushings before heating.
 
Goat Herder

Goat Herder

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Apr 28, 2008
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I was soldering a carb jet shut the other day at work. As the carb was running too rich. I almost ruined the jet using a Propane torch. Yep it melted that jet on one of the bottom edges.
 
2door

2door

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Sep 15, 2008
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I doubt you'll have much luck heating and bending a cast aluminum rocker arm. It will break before it bends. I'd suggest checking the squarness of the rocker arm shaft to the valves. Could the shaft be bent? I doubt that the castings are that far off. Has this engine ever been apart before?

Tom
 
MotorBicycleRacing

MotorBicycleRacing

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2door said:
I just went out to my garage to check two HS engines. Both have cast aluminum rocker arms.

Tom
Click to expand...
Are yours Titans?
Both my GXH Honda's and 49 cc Huasheng are steel as in sticks to a magnet.
I checked too.
Yes, the rocker arms in the pic do look like cast aluminum.
My rockers have a more rounded look and the motor is older.

I guess they are cheaping out in the new Huashengs or
in the tapered shaft version.
The steel rocker arms in the Honda are very nice pieces.

My Huasheng is the 5/8" straight shaft version.

The OP Huasheng is the tapered shaft or built in clutch pack.
 
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scotto-

scotto-

Custom 4-Stroke Bike Builder
Jun 3, 2010
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Mr. Minecraft said:
I just did that. They are not bent. What do you suggest I do?
Click to expand...
First off, the only way you would know the valves were bent or not would be to split the crank case open and drop the valves out for inspection Did you do that?

Also in the first pic of this thread it looks like you're pushing the rockers over to that side......that's what I'm seeing. I wouldn't worry about it too much if the engine is brand new and has been running fine. If it's not broke, why are you fixing it?

I'll take some pics of mine and be back for your response.....
 
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scotto-

scotto-

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Jun 3, 2010
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OK, look at these pics. As you can see there is alot of side play with the rocker set-up. These are normal.....your's are normal....life is good! Now go ride your brand new bike and quit tearing it apart every 5mins. Honestly.






dnut
 
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