Installed finger throttle and now I need to adjust the cable

[Corey Skay]

Installed blowsion finger throttle but now when I start up it is running at 5k rpms. I tried removing the nut off the seadoo adapter for the finger throttle but then it hardly wants to idle. I'm guessing the nut needs to be on, how can I adjust the cable/throttle? I'm not comfortable enough to adjust the idle on the carbs. I would love some help!

 

[98GCLimited]

You need to adjust where the cable meets the bracket on the front carb.

 

[Sportster-2001-951C-Stock]

See if this helps:

Generally, the throttle cable adjustment is done at the engine end of the cable. There should be no need to adjust the idle stop screw.

I suggest adjusting by loosening for more slack in the cable, it's holding the throttle open not allowing the throttle bellcrank to return to the idle position.

1st, once you get all the slack available by backing off the jam nuts, the engine should idle normally (linkage at carburetor bellcrank is in idle position and not being pulled on by the cable).

Assuming you are able to accomplish this then zip-tie the throttle lever on the handlebar to full throttle position.

At the engine, pull the outer throttle cable sheeth away from the carburetor (you might need to adjust jamb nuts, perhaps) enough to pull the carburetor bellcrank to full throttle position and adjust the jamb nuts finger tight on the outer sheeth to hold the carburetor bellcrank in full throttle position.

Check throttle cable operation before final tightening the jamb nuts, there should be just a tiny bit of slack in the inner wire, enough to allow carburetor bellcrank to return to idle position (inner wire isn't pulling bellcrank off the idle stop screw, bellcrank is resting on the idle position adjust screw).

You currently have the cable adjusted too tight or, the cable is not compatible (inner wire isn't long enough).

 

[Corey Skay]

Awesome, I figured I had to adjust it at that bracket but didn't know how to go about it. So just to make sure I got this, just by loosening the jam nuts (both nuts?) from the bracket will allow the rpms to return to idle. Then by zip tieing the throttle wide open, tighting the jam nuts and then releasing the throttle will allow enough cable slack for the throttle to close to idle.

 

[Sportster-2001-951C-Stock]

Yes, releasing the throttle must allow enough cable slack for the throttle to close to idle.

To start, back both jam nuts off to the end of the threads of the sheeth threaded portion. Then the carburetor bell crank should be sitting on the idle stop screw.

There should be a lot of slack in the inner wire of the cable at the carburetor this point.

Now once you zip tie the throttle lever, grab the outer sheeth of the throttle cable and pull on it enough to open the carburetor to full open travel, this will move the bell crank of the carburetor to the full throttle position. Hold the sheeth taught while running the outer jam nut up against the bracket using your spare 3rd hand. Then run the inner jam nut up against the bracket.

That should get your jam nuts in the correct location, remove zip tie and release throttle lever, maybe tighten both jam nuts a little bit to lock them together enough while testing so they don't vibrate around.

Then once you're sure the cable is operating correctly then tighten the jam nuts snug.

The idea is to have the carburetor bellcrank reach full throttle position just as the throttle lever reaches it's maximum full position. The reason is, if the cable is too tight then it will snap or bend the throttle shaft of the carburetor when you yank the lever too hard. Also, you should be at normal carburetor idle once the lever is fully released.

So right now the cable is adjusted too tight most likely, or it's too short for this setup. One or the other.