Hand Throttle
I needed a hand throttle to bring up the RPM for my on-board air
system. This is an inexpensive and easy task to perform. First, I went
to my local bicycle shop and purchased a Shimano 7 speed gear shifter
and the cable
and casing to go with it. I decided to mount the shifter on the
transfercase
lever, up near the top for easy reach. The shifter mounting bracket was
a
bit to big, so I needed a bushing to shim it up. I couldn't find one
anywhere
that would work, so I used some metal stock that I had lying around and
bent
it around a 1/2" socket and formed it to the size I needed. Once the
shifter was mounted I ran the casing down through the transfercase
boot, under the carpet, up under the dashboard to the top of the
accelerator pedal. Then I
made a bracket that mounted to the firewall, using two of the
accelerator pedal mounting bolts. I used a cable clamp off of my
mountain bike; it is used to adjust the tension on the brake cable.
Then I drilled a hole in the side of the accelerator pedal lever,
bolted in clamp, ran the cable through the casing and tightened it all
up. At this point it takes 3 clicks to bring the engine up to around
1500 RPM, which is just right for increasing the flow
of the on-board air compressor. I have noticed that the cable is
kinking at
the accelerator pedal, so I plan on getting a longer piece of cable and
casing
and running it right to the throttle linkage on the throttle
body.
I ended up
getting the shifter cable for a tandem bike. I ran the cable along side
the accelerator cable,
then through the plastic piece on the throttle body and tied it off
with a crimp fitting.
This set up has worked flawlessly for five years.