After 4 tanks of gas piston starts hitting spark plug

[digital_life]

Screw the plug into the head tight and test how far it extends into the combustion chamber with a spare piston. If the plug leaves a mark, then you need a new head. I don't think the plug is the issue.
Pull the cylinder off and check the piston pins and rings.

When I put the plug back in after looking at before I rode today I thought to myself something did not feel right, I was actually wonderering if something was going on with the threads even before this I thought the threads felt a little weird

 

[digital_life]

That's a nice head. Did you check the piston?

It's got a little nic in it, You can see it if you zoom in on the 3rd and 5th picture

 

[Chainlube]

Princess Auto round wire brush, run it through the hole a few times.

 

[Chainlube]

It's got a little nic in it, You can see it if you zoom in on the 3rd and 5th picture

I see that, it could be from a piston pin that the rings run in against.

 

[Chainlube]

You won't hurt your engine if you lift the cylinder off the studs. It's better to be sure that the piston is in good shape, that take a chance and ruin the whole top end.

 

[digital_life]

You won't hurt your engine if you lift the cylinder off the studs. It's better to be sure that the piston is in good shape, that take a chance and ruin the whole top end.

Good point I was actally thinking it would be easier just to slap a new head on I guess it would be worth it to make sure everything is alright before wasting my time and causing more damage

 

[digital_life]

Princess Auto round wire brush, run it through the hole a few times.

It's not a hole.

After reading your last couple of posts I think I'm going to take jug and piston clips off and check the piston pin and the needle bering

 

[Chainlube]

It's not a hole.

After reading your last couple of posts I think I'm going to take jug and piston clips off and check the piston pin and the needle bering

On the side of the piston, inside the ring groove, there is a pin in each groove. One on the right side and one on the left side, they both should be on the intake side of the piston. Look for them, if they are still there, then you're OK. No need to take piston off.

 

[Chainlube]

It's not a hole.

That was a reply to post #11. Where the plug had a lot of resistance going in.

 

[digital_life]

That was a reply to post #11. Where the plug had a lot of resistance going in.

It went in normally with my fingers but seemed a bit weird when tighning it with a socket, now that I think about it it did seem to go bit to far