2006 Honda XR125L Top End Tear Down (Push Rod CG125 Engine)

[zzpza]

I've been trying in vain for about two weeks to try to get my little green lane wannabe to start. Air, fuel, spark - it has all three. Then last weekend I checked compression, and found it was 2 bar. There's the problem!

I had originally hoped to get a 144/149cc cylinder and piston, but all the ones I could find needed a bigger throat on the crank case than mine has, and I really didn't want to have it machined out, so I went with keeping it at 124cc.

I've ordered a Chinese cylinder and piston off eBay. This is my third bike and only for fun, so if it craps out / wears fast that's not so much of an issue. I know you get what you pay for, but I've barely ridden this bike since I bought it (in it's current condition), so don't know if I want to keep it or not.

Carb and inlet manifold removed, exhaust detached (can't remove it as one of the genius POs welded the down tube to the silencer).
https://i.imgur.com/Q8fyLfr.jpg

Rocker cover removed.
https://i.imgur.com/ftiv0Cb.jpg

Rockers removed.
https://i.imgur.com/DOh13AA.jpg

Head removed. A 'bit' of carbon to clean off.
https://i.imgur.com/hph9D6w.jpg

Cylinder removed.
https://i.imgur.com/3KujZmi.jpg

Piston exposed.
https://i.imgur.com/6LGR4IZ.jpg

Scoring on the barrel.
https://i.imgur.com/36O5vkX.jpg

Scoring on the piston.
https://i.imgur.com/Bhq7t1T.jpg

https://i.imgur.com/eGQBuZv.jpg

Is that soot past the rings?
https://i.imgur.com/otQJp06.jpg

Waiting for rebuild.
https://i.imgur.com/LkesEyj.jpg

So I've ordered a new Chinese piston / bore / rings / gudgeon pin / gaskets set, as well as a few tools I'm short (got bugled a few years ago and most of my tools nicked). I doubt it's all going to turn up this weekend, so will (hopefully) be putting it back together weekend after next. Assuming there's not something I've forgotten to order!