How To Tear Down The Head

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Dabomb

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What you will need :

Allen Keys
8mm Spanner
9mm Socket
10mm Socket
Phillips Head Screwdriver
Your bike.
Some Rags.

Bolt types will vary from bike to bike.

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1. Remove the 3x bolts holding the front fender on with a 8mm Spanner.


2. Remove the oil cooler with a allen key.


3. Remove all plastics and seat bolts with a phillips head screw driver.



Continues below.
 
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Dabomb

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4. Remove rear mount for exhaust with an allen key.


5. Remove the 2x 10mm nuts from the head with a 10mm spanner.
now remove the exhaust.


6. Remove the bash plate mounts on either side of the cylinder ( only if you wish to remove the cylinder too)


7. Remove the 2x 10mm bolts holding the manifold and carburetor onto the cylinder head.


Continues below.
 
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Dabomb

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8. Remove the 4x head stud bolts evenly by loosening off the bolts in a diagonal manner. (top left->bottom right->bottom left->top right).


9. Remove the main cam bolt with a 10mm socket. (Caution the cam sprocket will have nothing but a gasket holding it on, remove the cover.)


10. With the cam sprocket cover off, remove the the head to cylinder mounting bolt with a 10mm spanner.


11. Remove the 3x cam sprocket bolts to remove the cam sprocket.
Have the engine in gear and 'crack' the bolt with a 9mm socket.
Remove the cam sprocket and let the cam chain sit in the head.


Continues below.
 

Dabomb

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12. The head is now ready to come off, a knocking hammer or a wooden handle of a hammer can be used to free the gasket from the head and cylinder surface. Once this is done slide the head up the head studs.

There maybe oil still in then head and it may leak, keep a rag handy.
Your done!
 
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Kingers

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good tutorial, never atempted to take the head off my bike because i never really knew how, might have to go try it over the holidays, thanks for the tutorial
 

wogtaz ryder

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nice. should help out alot of people ,

and make people realize these engines Are Not Rocket Science!
 

Dabomb

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thanks for the praise guys!
will wright up the next one 'How to tear down the cylinder' soon
 

fordrule

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OMG thanks soo much man, now i can try and repair my bike!!! i didnt think u were spose 2 unscrew the cam cog!
110% mate!!!
 

Speedy150

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when you put it back together how do you make sure the timing is right?
 

Dabomb

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allign the magneto T timing mark with the notch on the crankcase ( the notch is at 360 degrees at the top of the crankcase, get down to low to see it.)

then with the cam sprocket bolts removed from the cam, rotate the cam sprocket inside the cam chain until the cam sprocket dot allgins with the the notch on the head its at 270 degrees (to the left of the circle opening, if you look at the where it is on the cam sits on the head.
 

Speedy150

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ahhh kk, i see, thanks for the reply mate, ill b taking the head off this week to do abit of a tidy up around the intake and exhaust ports, just wanted to make sure i can get it back together again! cheers
 

4stroke

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good job mate now im confident to do it myself cheers
 

I_THUMP

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A mate of mine just did this to his 150 Lifan and now that he has put it back together it has a bad rattling kind of noise coming from the head. Can anyone tell me what that means?
 

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