New bike Treck MTB

Well done. Some guys like the dual brake lever and some don't. I used one until I got a centrifugal clutch.

The stock throttle has a really long twist to wide open. The stock kill switch is notorious for failing soon after installation. Replacements are personal preference. You can get a bolt-on kill switch at a powersports (quad) shop. I like thumb throttles, so I made one from a mountain bike thumb shifter. You can also get thumb and twist throttles at the powersports shop.