Whats my yamaha 701 big bore worth?

[Dustin88]

Just curious because I cant decide what to do with my engine, I may sell it.
What do you think a yami 701 with a 62t bottom end, 61x top end, 6m6 crank bored out to a 771 with weisco 710P4 pistons(85mm pistons) is worth?

Its in great shape with new crank seals, it has a stock 760 64u head with 150 psi compression on both cylinders.

just looking for a ball park fiqure?

 

[chriselmore_1]

resleaved or just punched?

 

[Dustin88]

Im not really sure. It came in a superjet I bought. Im guessing its resleaved because I didn't think you could go that large on factory sleeves.

 

[Matt_E]

750-900 max.
Is it ported? If so, that adds value. Find out if the sleeves are stock 61X sleeves or not.
If they are stock, that cylinder isn't worth much because it has no overbores left
If they are aftermarket big bore sleeves, that adds value.
Are the cases ported?
How old is the crank?

 

[Dustin88]

How can I tell if They are 61x sleeves or aftermarket? I have the head off now if anyone knows how wide a 61x sleeve is

Also I dont think it is ported but how would I know if it is? Does anyone know how wide and tall stock 61x exhaust ports are? The motor came out of an old sn racing superjet that had all the goodies but I dont know what all was done to the motor.

Also is there any advantage to running a 6m6 crank? I heard somewhere that they are lighter then a 701 crank

 

[Waternut]

Snap a couple pics of the intake and exhaust ports. I asked the question about 61x big bore resleeve vs 61x overbored not too long ago and basically the big difference was the outer sleeve diameter at the bottom of the cylinder. No one mentioned anything about the top of the sleeve being bigger so I don't know if that is or not.

 

[yamanube]

Also is there any advantage to running a 6m6 crank? I heard somewhere that they are lighter then a 701 crank

Same crank.