Left-hand throttle adaptations are usually straightforward. The most common method is to use a right-hand twin-cable twistgrip fitted on the left handlebar, with the throttle cable routed through the inlet that allows for twist-back left-hand use and the other inlet sealed to prevent water or dirt ingress. This may require slightly repositioning the left-hand switchgear, but it remains fully functional.
Alternatively, a thumb-operated throttle can be fitted. Many riders with limited right-hand use find a thumb throttle easier to manage, and these are commonly available due to their use on quadbikes and snowmobiles. Both right- and left-hand versions exist, such as models originally designed for snowmobiles that work well on motorcycles.
Any competent motorcycle engineer should be able to carry out this type of modification, though custom motorcycle builders may be more experienced with adaptive work. It’s also worth asking the NABD (National Association for Bikers with a Disability) community for advice or photos of existing conversions. If cost is a concern, financial assistance for adaptations may be available through the NABD.
