Nobby no spark advice

Vito +3mm crank in there by the looks of things. that piston been eaten. sure it ran without a filter or a very dirty one. lack of maintenance and poor jetting there.

What is your oil to gas ratio? I recommend 32:1 , running your fuel too lean (not enough oil) can cause this damage to your cylinder and piston.

If you have the oil injection still hooked up I recommend removing that as well because they are not reliable in my opinion the slightest bend or blockage in those oil lines will result in inadequate lubrication. So i would just mix your fuel by hand

Check your reeds and your air filter, debris getting through your intake can also cause this type of damage. Especially because your damage looks to me like it’s aligned with the intake or exhaust holes.

Considering the blaster is air cooled Heat Seizures is also a thing to consider too

There’s a lot of different things to consider when looking at a piston failure I listed a few possible causes of many, I hope this helps, keep us informed!


(Been typing this and took a break for 2 hours, just noticed your recent update, been working on my trucks transmission forgot to click post on this, so ignore my fuel ratio part)