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Clutches

fatboy67

Member
Joined
Mar 29, 2008
Messages
107
About clutches

Hi to all,
This is all on a Chinese 2 stroke
I have read and searched for long enough.
Can some one tell me,,1) How to get the clutch pressure plate off ( the one with the teeth)???
2) Does this plate have its own bearing in it's centre Joining it to the sprocket that has the 3 pins ???

My clutch plate is now very loose and makes noise especially when coming down a hill. This all started from a long story that I won't go into as yet.

Please help
Thanks Gilbert...........

MBC EDIT: THIS THREAD HAS BEEN MERGED
 
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fatboy67

Member
Joined
Mar 29, 2008
Messages
107
I'm talking about the pressure plate

I got some good tips here when I tightened mine up.
Hi Mark thanks for your reply, but I'm talking about the pressure plate Your talking about the cover on the out side this you can tighten I know, but the pressure plate the one with the teeth on it. It wobbles and vibrates more than normal after it got jammed with a piece of metal, that was floating in the cast casing.
 

fatboy67

Member
Joined
Mar 29, 2008
Messages
107
When I refer to pressure plate I'm talking about the one with teeth on it.
With HT 2 stroke motors, Does any one know if the center of the pressure plate has some sort of bearing it rides on????????????

does any one know how to remove the pressure plate???????????

Thanks Gilbert
 

BoltsMissing

Active Member
Joined
Jan 31, 2008
Messages
897
fatboy67
Go back to that web page and on the left klik on the link that say's Instructions.
Scroll down till you see a picture of this black "Screw Tool".
You need that tool to get the plate off.

All the Best

BoltsM
 
Joined
Feb 21, 2008
Messages
38
When I refer to pressure plate I'm talking about the one with teeth on it.

does any one know how to remove the pressure plate???????????

Thanks Gilbert
i think the part you are referring to is the flywheel. the pressure plate is the part that disengages from the clutch material when you pull the lever.

http://auto.howstuffworks.com/clutch1.htm

anyway, my Dax 65 has the same noise, and i have no idea how to pull the flywheel to check the bearings. I have the "screw tool", but the nut in the center will not come loose, the nut on sprocket side keeps coming undone 1st. wondering if there is a way to safely hold the sprocket and undoing the nut at the same time? will be following this.
 

BoltsMissing

Active Member
Joined
Jan 31, 2008
Messages
897
Well, before you all go any further, my suspicion is lack of grease inside that clutch shaft housing.
How to get sufficiant grease in there between those 2 bearings is to use the hole where the clutch cable holder goes, underneath beside the carby on the rear right side of engine.
Remove that cable holder, poke a penlight torch in the hole, and you might see a large spring. Fill that hole with oil first to test the noise level, rotate the engine and see if it makes a differrant sound.
My bet is, lack of lubrication. I'm tempted to go get a grease nipple, a grease gun and plaster it with grease till kngdom come.
 
Last edited:
Joined
Feb 21, 2008
Messages
38
I'm tempted to go get a grease nipple, a grease gun and plaster it with grease till kngdom come.
wow, that is actually a pretty good idea.. hmm. would the grease squirt out of the gap between the flywheel and the 3 pronged pressure plate holder (there has to be a technical name for that piece?) and onto the clutch pads? or is there a bearing in there some place to block that? bet that would make for some slippage. but if you attempt, please document.
 

BoltsMissing

Active Member
Joined
Jan 31, 2008
Messages
897
cherrybombking

would the grease squirt out of the gap between the flywheel and the 3 pronged pressure plate holder (there has to be a technical name for that piece?) and onto the clutch pads? or is there a bearing in there some place to block that? bet that would make for some slippage. but if you attempt, please document.
I am taking a old 70cc apart in my spare time, and this is simply the story as it unfolds.
The way I read it, I assume there IS a perfectly built HT, but the original manufacturers and the original blueprints are sumwhere, maybe not Chinese, These engines might be copies of an original from a by gone era.

However,
In that shaft housing is a a large strong spring and it turns the same time as the shaft turns.
What I find is brilliant by design, the srpring as it rotates acts as a worm driven lubricator for the bearings,maybe.
It also seems to be a tight fit between the walls of the housing, hence the noise if lack of grease ? !

I would imagine then, to "service" the engine periodicaly, a grease gun nipple may have had to be inserted, greased up, then rotate the engine with the hole unplugged.
This would allow excess grease to escape, therefore not getting past the sealed bearing. I'm not sure though if grease will reach the actual bearings if they are sealed. Some might seap through as the engine heats up.
 
Last edited:
Joined
Feb 21, 2008
Messages
38
I am doing all this on a coffee table and tools are limited, I can't get the screw off the small engine gear. But the casing has split open, not fully apart,yet.
how did you get this nut off? i cant get a screwdriver to hold the small output gear (with the GIANT flathead slot) on the other side. without it slipping, and i would prefer not to strip it. i was actually thinking of just buying another dax kit so i could dissect/rebuild and have spare parts.

also, how did you loosen the flywheel nut? as stated before, i can get the sprocket side undone, but cant figure out what to grab onto to loosen the flywheel side.

do you happen to have pictures?
 

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