Resleeving to a bigger sleeve in a Pro-x cylinder depends on where the head studs are located & size (DIA) of the o ring grooves.
The 250/265 non pv cylinder castings are the same, 250/265 pv cylinders are different from non pv. 310/330/350 are same casting, just different head stud location & o ring groove sizes for each STD bore size. 310/330/350 pv cylinder castings are different than non pv cylinders.
I dont think the 265 could be made into a 350, unless some heavy machining & welding was done. For one, like where the head studs are located now, those holes would need filling in & moved to the outside farther away from the bore. O ring groove in the casting would need welding up & deck re-machined flat.
Inner o ring groove, no problem because its located in the top on the sleeve itself.
Now, once thats all done & you have the bigger sleeve in place, now the portings all off from what it was before & will need to be reset to your likeing so thats a port job.
After its all done, welding, machining, taking what you have & turning it into another size, 265 up to a 350, you now have over $2,000.00 or more into a used cylinder that you could have bought brand new for around $1200.00.
It can be done though.
If you can do welding & machining, thats a big cost savings.
Neil
