I have always used Power Madd with no problems but I know that a couple of my buddies have had issues with them... I think that you can get an extended throttle line from RSI... might want to check them out.
I just finished looking everywhere and at anything. To use my exhisting flipper, I put an XP block on and it fits perfect. Best part is it's only about $17 (or something like that)
I think mine is a powermadd throttle block (can't remember for sure) with an arctic cat flipper. I'm using a push button kill switch for a dirt bike (I think) for my reverse and kill switch.
i have a arctic cat throttle body and flipper. i mounted my new kill switch next to the hand warmer toggle switches. used a weatherproof switch and matches the other 2 perfectly.