Chainsaw Repair

Thanks guys for the input.
 I bought a 034AV when they first came out in 1984 when I was cut and skid logging. At the time it didn't have the grunt of my Jonsered 630 and 038AV but it was sure light and quick in small spruce and Jack pine.
It's side tensioner was a very unique feature then as no other saw had it.
I replaced it with a 038Mag in 1985.
My brother bought a 034 Super (61cc) around 1986 and it was a good improvement in power.
By then I had already bought a 064 and ran 18" b/c with it in all size of wood.