|
Post by stretchmobileski on Jan 25, 2014 0:20:38 GMT -5
What do you do about the dual cables when you are going to use a foot pedal? Eliminate the idle cable and put a stronger return spring on?
|
|
|
Post by Liteway on Jan 25, 2014 10:06:51 GMT -5
Getting smooth throttle action was tough. I wound up terminating the side not going to the gas pedal on a soft spring to get the butterflys to fully close when off throttle. Lots of turns between pedal and carbs meant lots of bends in the housing with an especially sharp one just behind my head where the cable reaches the carbs. I could not get smooth action through the housing because of that last sharp 90 degree bend. Looked at small aircraft practice for their control surface cables. They use pulleys to make direction changes, not high friction housings. This is the way to go for a tight 90 or even 180 for that matter. I used nylon pulleys with brass centers on ball bearings about 1.5" in diameter. 1/4 " bolt fits snug through the center to attach it to a frame tab. They are designed to support heavy sliding patio doors. Available at Lowes or maybe Home Depot for about 3 bucks. No lubrication necessary and they have been corrosion resistant.
Existing return spring on the carb linkage worked fine after this. No additional spring necessary on the cable to the pedal.
|
|
|
Post by Liteway on Feb 13, 2014 18:39:57 GMT -5
Facing forward, looking down.
|
|
|
Post by stretchmobileski on Feb 13, 2014 22:17:42 GMT -5
Facing forward, looking down. Thanks, that helps.
|
|
jj
Junior Member
Posts: 11
|
Post by jj on Apr 24, 2017 16:55:37 GMT -5
Thanks, these options help tremendously. I'll be using the linkage in the pictures from Stretch, and I've decided to go with the starter motor and friction on rear tire for the reverse option. Thanks again everyone. Great insights......JJ
|
|
|
Post by srx660 on Aug 13, 2017 19:26:57 GMT -5
I was just talking to a kawasaki mechanic about the dual cable throttles recently. He said the dual cables were used to make opening and closing the butterflys easier and also making them close fully (Something about the venturi effect keeping them slightly open when deaccelerating). Using springs on a mechanical linkage for 4 carbs would have to be quite heavy to hand turn, so the return cable made it easier and fully closed the butterflys. On some race bikes i've been around without the return cable, the motor seems to vary the revs when deaccelerating, creating a rythmic run pattern. I have noticed this same effect on my Kaw 900 eliminator that i used a spring to replace the return cable.
SRX660
|
|