Engine Trouble Minarelli/Athena dead?

[CrispyLeaves98]

Hey guys! Been a while. My minarelli died a while back but I've been extremely busy this whole summer, I took off the cylender and there wasn't even the slightest scoring. I'll throw in a picture. I have a new Athena cylender and piston and putting it on is very straightforward and I'm not worried about that. My question is the minarelli wouldn't start, and I haven't thrown the Athena on yet, and it died by while I was riding if I went full throttle it would bog like there was no spark. I tried changing the plug but it might've been a bad plug.the only thing I can think of is cdi magneto carvueration or spark. It had compression. Me and my friend have 4 days to prepare our bikes to be ready to take and drive around on an island a while away. I'm bringing tools and a yd100 spare if any of ours break, I know it's ridiculous but, so whaddya guys think?

 

[CrispyLeaves98]

Update: I don't have any pics with the cylender off but trust me there isn't a single ameking on it, she looks brand new both the piston and cylender!

 

[CrispyLeaves98]

Maybe not on the piston...

 

[Nickt919]

It's hard to tell from the pics for sure but the top ring looks chipped or damaged in more than one place. If your kit is a Chinese kit, then it needs the ports chamfered. If you leave the port edges sharp the ring can hang up.

 

[weefek]

Nothing obvious. You should always have a spare CDI anyways.

 

[CrispyLeaves98]

Okay. I'm throwing on the Athena cylender piston and bar it comes with. Supposed to be way higher quality. Also adding a new cdi. If it doesn't start after this I'm changing magneto and removing Killswitch, although I've never had any problems with a Killswitch before. I also need to make sure it's not grounding out on the bike frame itself, probably wouldn't be a bad idea to wrap some electrical tape around the connections if it works. Wish me luck! The Athena also comes with newer rings, everything is much more heavy duty.