K6+ top clamps have oblong ignition switch holes, don't need to have the steering stem hole opened up, and will only lock in the center.
It really depends on displacement.
The hole in the frame for steering lock on 2nd gen SV650s and all SV1000s is centered.
The stock top triple clamp has the ignition switch offset to the right, so that steering lock works with the bars full lock left.
01-03 750 is 32mm offset, 25mm stem hole, ignition offset to the right (correct for our bikes)
04/05 600/750 is 30mm offset, 25mm stem hole, ignition offset to the right
01/02 1000 is 32mm offset, 25mm stem hole, ignition offset to the right
03/04 1000 is 32mm offset, 28mm stem hole, ignition offset to the right
06-09 600/750 is 30mm offset, 28mm stem hole, ignition offset to the left (too far to use)
05/06 1000 is 30mm offset, 28mm stem hole, ignition centered (straight steering lock)
07-09 1000 is 28mm offset, 28mm stem hole, ignition offset to the left
06-09 600/750 are the best fork choice (due to length, valving, overall quality). They use 53mm lower triple clamps (most of the other ones are 54mm, with 07-09 1000 56).
If you're using 06-09 600/750 forks, you need to use a triple from the same series bike.
If you want a top triple clamp that bolts up, you have two options: 06-09 600/750 or 05/06 1000. The former has no steering lock, the latter has centered steering lock.
If you're willing to have some machining done, you can use 03-04 600/750 top clamp with the hole opened up to 28mm. This will give you a normal steering lock (locks with bars at full lock left). This is a reasonably simple machining task.
If you're willing to have more difficult machining done, you can use 01/02 1000 or 01-03 750. The hole has to be opened up and moved. This is a more difficult operation.
It's also possible to press in (with the right locking compound) a slug and then put a new (offset) hole in the 03/04 1000 triples.
I'm pretty sure I have all of this right, but can't guarantee it.