81 Honda 250R thumb throttle

[troyky29]

I picked up a 81 Honda 250R last weekend. Was thinking of trading it off, but now thinking about hanging on to it for a while. Currently it has a twist grip throttle on it, which I do not like. I'm sure these came out with a thumb throttle. My question is, where can I get a thumb throttle for his atc? Original or aftermarket doesn't matter.

[atc300r]

Just about any 200x,250r thumb throttle will work. You may also need a new throttle cable .Some of the twist throttle cables are different than the thumb throttle cables.