EUNORAU Full Twist Hand Grip Throttle For BBS/EUNORAU Kits

First put the throttle on the handlebars, on the outside, there is an Allen screw for tightening.

Note, this throttle secures to the ID (inside diameter) of the tubing, not the outside. For bicycles with aluminum handlebars that have too much wall thickness, the interior expansion bolt will not fit in. The handlebar tube ID must be at least 17mm. If you have less, you can remove some throttle material with a driller. Use a long M5 screw with a nut and turn the driller anti-clockwise on a file.