Re: Throttle Upgrade Question
You could look on ebay or a motorcycle parts supplier for something for a dirt bike or ATV. In fact, anything for a Japanese motorcycle should work since they are usually all 7/8" handle bars.
You can even get the complete throttle control with the kill switch to work on your bike.
The Japanese stuff is much better than the cheap Chinese junk that comes in these kits. Even the Chinese made motorcycle parts are usually better quality than what comes in the bicycle kits.