I cannot bear to ride with my twist grip. I broke my arm about a year and a half ago (broke both bones, snapped chunks out of my wrist socket in compression fracture, cast to upper arm, 8 weeks in it) and I can't take this twisting. I can't open my throttle all the way on my 1999 WR400 (I didn't even know it had top end... I couldn't twist it far enough), and can't ride very long without it hurting. I will come home from a ride, and move my wrist as far as it goes, and listen to it pop. Loudly. I can ride a quad all day with a thumb throttle going at it in the dunes. Are there any real reasons to stick with the twist? It is very hard for me to use... and does anybody make a thumb throttle that has push/pull cables, or can I convert my WR to just pull? This is getting frustrating... I feel like I have infinitely better throttle control with my thumb (maybe 15 years of quads will do that)... How about some feedback either way. I don't want to go to a 1/4 turn throttle. So... does anybody know of any Push Pull thumb throttles, or how to use just a pull throttle by converting the carb somehow to pull? Is it safe or feasible. I LOVE my WR, it is just hard for me to ride with the twist grip. Thanks for any help.