Question about Pacific International Mongoose 20 in. Boys El Rey

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20'' Mongoose BMX - How can i adjust handlebar height?

The bike has a Aheadset stem assembly if that helps.Owner's manual does not talk about height adjustment only angle adjustment. I have loosen everything on the stem and handlebar and can't get it to come up. Whats the deal?

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  • cpellegrin Jun 20, 2009

    No dice. Unscrewed nut like thing and stood on foot peg and pulled got nothing , hit the bottom of handlebar with rubber mallet still nothing. Don't have any thing to spray on it , but bike is only 1 month old. Pulled and hit hard enough for something to give.About to pull the whole thing completely apart.Looks like the hand brakes are the only thing holding the handlebar to the stem when nut thing is loose.Let me know if you have any ideas. Thanks for the help.

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You need to unscrew the circular nut like thing on the stem all the way off and pull up hard on the bars and it should come up, try spraying some lucricant on the stem to loosen it if needed.

Posted on Jun 20, 2009

  • Nathan Jun 21, 2009

    Once the nut was loose did you untighten the circular screw bit underneath the nut?

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Aheadset headsets and clamp on stems are set to the maximum height from the factory, they can't be raised any higher without buying a new fork with a longer steering tube. Some times there will be a couple of washers under the stem and above the upper bearing of the headset that can be removed so that the stem can be lowered. These types of stems typically have a cap that screws into a "star nut" inside the steering column with a #4 or #5 Allen head socket bolt, this is used to adjust the bearings. Remove this cap and bolt (don't mess with the star nut, it is press fit into place), next loosen the one or two bolts at the back of the stem (typically at the back of the stem but not always). Be careful when removing the stem because there won't be anything holding the fork in the bike frame and it can fall out on the floor if you aren't careful. You will also notice that the fork is real sloppy without the stem in place now.

Posted on Sep 25, 2014

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