Well my modded 14 12 works too well.
All of my head nuts torqued to 14 ft lbs copper gasket. Restricted at throat of exhaust ...
Happy piston tho 1500 miles
It's been hot and you have a compression leak.
Seriously though, your head probably warped when it got too hot, making the combustion leak
how much squish did it run?
I would look at some new parts. You can try lapping the head just to see how bad it's warped.
Those a55 kits with the supplied base gasket make way to much compression. I always shim them with a 1mm base spacer.
I really feel like those heads always warp. It seems like the slightest over torquing and they are done...one they warp they don’t like to deal again. I would grab a new head and space it up 1mm like Daniel said.
three outta four sides r leaking
Not leaking in too little squish good call the only hot spot is where the plug gap was
I got a domed hi comp head tiny fins looks like zippy the pinhead on the hero or airsal.
Its 70cc tho.
Swapped to the kickstart bottom and herokit. Keep in this as back up. Same funky angles on exhaust and intake.
The Colibre is getting the airsal reedkit and pedals. Technogas next pipe. Amal 19 if I can get some jets.
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