crank seal, plug readings.
Ok, short story. Purchased the 91 mach 1 617 a few years ago. Took it out and first time out it blew up. Tore it down it melted the ex. port area of the piston. Rebuild it and took it back out, did a throttle chop and read the plugs. The pull start side was very lean, the primary side looked fine. So it has been sitting for the last 2 years, now that we have snow and i have some land to ride on of my own I'm getting the itch. So Is it possible that a bad crank seal would only show on one cylinder and not the other? I didn't notice any cracks in the carb boots, but i could have missed it. I want to dig into it again in the next day or 2 after i drag it back into the garage that i can mess with it. I also finnaly located that dang anti torque mount bolt so it won't eat belts, it will need a new ski or maybe both and a new track soon as i had to go max on adjustment but i don't want to drop money into the skis or a track until i can get it running properly.