I've searched the net to no avail. I have a Revloc clutch in my 300 EXC. I love it. I had a Rekluse in my previous 450 EXC, awesome! I had that set up with a left hand rear brake instead of the clutch lever and really liked teh set up. With the smoker, I'd like to keep the clutch lever for adding some clutch slip in less than stellartraction situations, but would like a thumb operated rear brake to help initiate slides, holding on a hill, and other misadventures. Has anyone come across either an affordable thumb brake option, or a home made job? I know Spiegler made one for superbikes, but I'm not gonna spend $600 for a doo dad for a $1000 dirt bike.