Let's assume he wants to take his SV onto a dirt road and do some turns by locking up the rear wheel, he really wanted to buy a BMW GS for this but couldn't afford it, his lucky lotto numbers didn't work so he's stuck with the SV.
Now that we've solved why he wants to do it, how about some constructive way of achieving disabling the ABS other than (my) suggestion in the second post.
If he's waiting for good advice here, I hope he's got a good book