Clutch/engine seized cylinder head won’t come off

[Toby woodman]

I have a new 66cc engine kit. While I was riding it, the engine started clicking and then Stalled. When I tried to re start it, the clutch started slipping. I have cleaned and de greased the clutch pads and adjusted it but it still slips and the engine won’t turn over. When I go to take the cylinder head off, only the main cylinder wall will come off. Help would be appreciated. If you have any questions ask and I can also send more photos. Thanks

 

[Toby woodman]

This looks like you broke a wrist pin clip and it's jammed in between the piston and cylinder wall. If you still have a warranty, return it.

what is a wrist pin clip?

 

[DAMIEN1307]

what is a wrist pin clip?

In the picture below, they are those curly Q things on the bottom left of the pic.

 

[Toby woodman]

what do they do? looking at the colour of the spark plug I'm wondering if the engine was running lean? maybe causing engine damage/

 

[Toby woodman]

This looks like you broke a wrist pin clip and it's jammed in between the piston and cylinder wall. If you still have a warranty, return it.

where can you see the wrist pin? lol I'm just getting into these bikes

 

[Deleted member 33388]

what do they do? looking at the colour of the spark plug I'm wondering if the engine was running lean? maybe causing engine damage/

 

[DAMIEN1307]

where can you see the wrist pin? lol I'm just getting into these bikes

Here is a pic of my old Zeda 80, but it didn't blow the wrist pins C clips, it blew the piston ring pins that are the ring "stops" on the piston itself that the open ends of the rings rings snug up against when they are compressed between the the cylinder wall and the piston itself.

The wrist pin C clip can be seen in the holes in the piston itself where the wrist pin and needle bearing that attaches to the crank shaft...Those little C clip, G clip thingys I showed you on the previous pic goes into the holes of the cylinder to lock the wrist pin rod and needle bearing in place once mounted onto the crank shaft.

 

[Toby woodman]

when slowing down with the engine at idle and the clutch lever out. I head a knocking/clicking noise. could that be wrist pins or could it be something else like running the engine too lean. could someone have a look at the picture of the spark plug?

 

[DAMIEN1307]

could that be wrist pins or could it be something else like running the engine too lean. could someone have a look at the picture of the spark plug?

Running too lean would more than likely helped compound the problem resulting in either the C clips on the wrist pin, or the piston ring pins to have failed and thus seized up your motor.

 

[Toby woodman]

okay. how common is this for just over 3 hours of runtime. is there anything I can do in the future to stop this from happening with my next bike

 

[Wrench]

when slowing down with the engine at idle and the clutch lever out. I head a knocking/clicking noise. could that be wrist pins or could it be something else like running the engine too lean. could someone have a look at the picture of the spark plug?

You'll never forget that sound will ya