Weld
, I have rigged an old arm with springs to hold it strait and apply downward pressure on the grip.
When i bend my elbo down i get about 1/6 to 1/5 turn on throttle. (need 1/4 turn for WOT) The hook can be described as a u bolt with one leg forward of, and one behind the throttle, this allows me to steer by swinging my elbo forward and back. (bike can be steered and throttled with out left hand on bars)
If front brake is needed lifting arm up releases throttle and lifts hook free of bar, then slight reach and drop over brake lever. (ok for dubin around or holding bike at stop light, but not for panic stops)
As of right now the only mod to the bike has been the addition of 2 friction cruse controls. (the kind that you press down against the brake lever) I am using them as adjustable palm rest.
Future mods to bike; a second rear master cylinder mounted in parallel, but with its line run to the front master cylinder with a double banjo bolt. This puts two masters on one slave, it works because both masters have stops to prevent back pressure blow out. Brake bias will be set for dry pavement panic stops.
Future mods to arm; stronger springs because throttle too easy and more control by building tension my shoulder. also clamp built into hook, arm strait hook/clamp open arm bent (even slightly) hook/clamp closed on throttle.
There is a lot of info here and yet, questions remain, as soon as I can I will post photos. The flood gates may open, but comments and questions are welcome.
Best,
Lefty
2015 Hawk 250
1972 Honda CT70
Lost along the way;
1982 GS1100L
1983 Honda 185s 2ea.
1974 Puch 175mx
Right Arm