Hi all.
Got the PM.
Havent been on much of late, a bit busy.
Been away for a few days, literally just got home. Half a day early, no way im drivin in the heat.
Tiger, Both engines are totally different.
The carbs are the same.
The pistons are the same. Well they should be. The engine in the Corsair should have the narrow transfer ports.
The later power torques had wider transfer ports and the pins for the ring neds were moved slighly but these pistons work fine in the earlier motors.
You say the cylinder is scored. You looked in the exhaust port and the cyl in scored. But the rings look OK. So if you give the rings a poke they will push in and out of the ring groove in the piston?? Good free rings are way more important than the condition of the cylinder.
Victas will run with the rings clagged up in the exhaust side of the piston and scored up the whazoo.
IE: they dont need much compression to run.
By the sounds of it, if it wont run, I doubt the score in your bore is the issue.
Can you put us up some pics of the cyl & piston looking in through the exhaust and inlet ports?? Or even cyl with the head off??
The pics above from Mark show it all pretty good.
I highly reccommend using a crank pin removal tool.
A bit hard to be real accurate doing the pin back up without one.
The rope trick is a great trick, just be careful on a 2 stroke not to stuff it in the exhaust or transfer ports then mush the rope with the piston while its in one of them.
If the head is loose an appropriate block of wood would work as well.
If you have a vice you can clamp that boss on the crank and do what you have to to the crank pin. You do not need to remove the crank to just hone and fit new (piston &) rings, just be a bit careful not to get honing slop up into the bearing.
When knocking the crank out with an old blade disk nut I usually sit the block upside down on a big redgum block I have out in the shed. You cant get the crank all the way out but just about.
