To each his own, but I think throttles are made to roll back automatically because of valid safety concerns. Cruise controls release at braking, so people are not trying to have their brains think in two directions at once in emergencies. Back in the day, a cousin had a throttle locked on his snowmobile, fell off, the machine went on without him, circled back and ran him over. If you had a heart attack, as was mentioned, you could be sending a Ryker on down the road and into the oncoming lane and hurt someone else too. A throttle locked like that is just not a good idea in my opinion. There are safer after market ways of dealing with hand fatigue. Still... you pay your money and take your chances... as they say. To each his own.