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FOR THE DO-IT-YOURSELF DUCATI OWNER
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THROTTLE CABLE ADJUSTMENT
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$0
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Maybe Pliers
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Disclaimer- As with any mechanical adjustment, if done improperly this procedure could be cause your bike to malfunction and could cause severe injury in the event of a crash. If you are at all unsure of your ability to perform this procedure correctly, PLEASE do not attempt to do so.
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All the fine tuning should be done at the throttle, the adjusters at the carbs are for major changes, and if you need those it is a safe bet that something major is wrong, like the carbs are installed at the wrong angle or something similar. Start by pulling back the rubber boots.
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What you are aiming for is 2-4mm or free travel. In other words, you should be able to move the twistgrip back and forth 2-4mm without engaging the throttle blades. To adjust for this, screw the cable in or out depending on if they are tight or loose. If they are too tight, screw them in towards the grip. If they are loose, screw them away from the grip.
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You should be watching the cables down below at the same time. You want to move the grip back and forth with the free play you have and see if the cables have slack in them. If you twist the grip and cables immediately move (by move I mean slide up or down to actuate the throttle blades, rather than just wiggle as if they had slack), they are too tight. You want to twist the grip, see some slack in one or both of the cables, then twist a little more and have it actuate.
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I set up this masking tape with marks to illustrate. You'll see that at rest, the mark on the bar lines up with a mark on the grip. Three millimeters away is another mark.
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When I twist the grip and take out the slack (just before it actuates the cable), the other mark lines up. That means I have 3mm of free travel.
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Now twist the grip all the way and check for binding. Then let go and see that it springs back into position.
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This just illustrates what you should look for as far as slack down below. At rest, the cable should have slack, otherwise the idle will be too high (it's already partly opening the throttle blades).
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At rest, you should be able to push up on the cable to see that it is not pulling the blades open already.
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Once finished, simply lock the locknuts down and pull the rubber boots over. Start the bike up and check that it does not change the idle when you turn the bars. If so, the cable are too tight. Alos check that the RPM's don't hang after you release the grip. If it checks out, you're done!
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This page is in no way associated with Ducati.com, nor is it an entity of Ducati Motor Holding, S.p.A. All content, information, and views expressed herein are those of myself and do not reflect those of Ducati or its affiliates. The "DUCATI" logo and "Circle D" are registered trademarks of Ducati Motor Holding, S.p.A., all other content on this website is copyright 2006, Monster Man Productions.
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