Thanks all! Some good suggestions. I have most of those solvents at home so will try a couple on the old grips and see what works. Luckily, I followed the Kawi instructions which, for the throttle grip, said use a "thin" coating of glue so hopefully it won't be too much work. Hate having the poor bike on the disabled list for something so simple.
"If ever a time should come, when vain and aspiring men shall possess the highest seats in Government, our country will stand in need of its experienced patriots to prevent its ruin."
- Samuel Adams