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Old 01-21-2010, 09:56 AM   #1 (permalink)
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Throttle Cable Adjustment

For carbed bikes, but will work with EFI as well.

Proper method to throttle adjustment:

1.) Loosen and put slack in both the throttle (pull) and Idle (return) cables.

2.) Turn your handlebars straight while adjusting the throttle cable, and to the left, while adjusting the idle cable.

3.) Adjust your throttle (pull) cable until the carb linkage arm bottoms out on the throttle stop, then back it off about 1/16". (a hair's width) At full throttle, you want a crack of daylight, but not contacting the throttle stop.

Failure to adjust the throttle cable first can result in a bike who's throttle is not capable of providing WOT response.

4.) Then, adjust the Idle (return) cable until there's about a 1/4" slack in the throttle grip, by adjusting the idle cable. (back and forth movement of the throttle tube)

5.) Start bike and move handlebars back and forth, making sure idle remains the same, and the natural movement of the throttle cables isn't pulling on anything, causing the RPMs to rise. Move bars to both left and right.

If a cable is improperly adjusted (too tight) by turning the bars can be enough to pull on the throttle cable housing, pulling it out of the stop-seat, and causing an uncontrolled throttle acceleration/response.

Video, compliments Viscious Cycles, Utah.

Adjust harley davidson throttle cables Video ? 5min.com
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Last edited by Dave63; 04-13-2010 at 05:55 AM.
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Old 01-21-2010, 09:58 AM   #2 (permalink)
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thanks for this Dave
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Old 08-19-2010, 08:23 AM   #3 (permalink)
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Dave, I resurrected this link. Tons of help, thanks!

I followed your steps in installing new ISO grips on my 2008 Low Rider. All worked well, except for the slack. When I adjust for 1/4" I hear and feel a slight popping of the throttle when I start to open it. It works OK after that. To get rid of the pop, I've had to adjust the slack to almost 1/2", which seems to be a little too much. Any suggestions?
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Old 08-19-2010, 08:32 AM   #4 (permalink)
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Try readjusting the cables to the proper slack then when it pops loosen the switch housing and move it around a bit then retighten . Make sure the housing butts against the brake perch tight .
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Old 08-19-2010, 09:03 AM   #5 (permalink)
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Quote:
Originally Posted by SCHMIDTYS View Post
Try readjusting the cables to the proper slack then when it pops loosen the switch housing and move it around a bit then retighten . Make sure the housing butts against the brake perch tight .
Thanks Schmidty, I'll give that a try. I did have a problem putting the housing back in place.
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Old 08-19-2010, 05:21 PM   #6 (permalink)
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Got the cables adjusted perfectly. Thanks for the help guys.

Followed Dave's steps above for proper adjustment of the throttle and idle. Getting nice snapback in all handlebar positions and should be set to achieve WOT (when the urge strikes). Just at 1/4" slack. Thanks again for the post.

Schmidty, cured the popping by taking the housing apart like you recommended, and also lubed the cables and under the throttle grip with Harley chain lube. Once I reinstalled it the popping noise returned a bit, but I got rid of it by backing off on the throttle friction screw. Works perfect now. Appreciate the help.

The black ISO grips look pretty good on my bike, and made a difference on my first ride - 1 hour, 45 miles and no numbness...nice.
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File Type: jpg New Harley Grips 004.jpg (722.8 KB, 69 views)
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