Well, I borrowed the Yosh Box from work (Parts Canada - sister company to Parts Unlimited) to test it out on my buddies TL1000S with RS-3 race slip on's. You plug it in, turn on the ignition, adjust the mapping etc, turn off the ignition, unplug the box. Repeat the procedure everytime you need to make a mapping adjustment. Personally the unit is not to user friendly. I think I would opt for the Dynojet Power Commander II, I believe this box stays on the bike and can be adjusted.
Yosh distributors will carry the box, it sells for $995 canadian, so check your US dealers!
[This message has been edited by BullDog (edited 17 August 1999).]