Question about Dahon JetStream P8

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Got a dahon jetstream '10 problem with it ,the clamp holding the handlebars to stem has broken off and looking for a replacement, any ideas where i can get this clamp,,

The clamp holding the handlebars to the stem has sheared straight thru - looking for the best place you'd recommend to go for this part..thanks

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Posted on Jan 02, 2017

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Good bicycle shops carry extenders for just this purpose. They will be glad to help you fit your bicycle to your needs.

Posted on Jun 23, 2009

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SOURCE: I have a Dahon Jetstream

Get the manual and fix it before you die riding it.

This link is good for overall stuff...

Posted on Jun 14, 2011

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Adjust handlebar height on Schwinn Varsity

I'm answering 7 years later. I have a Schwinn Varsity 2500 Bike made probably in 2015. The Schwinn Varsity Bike is not set up the same way as a traditional bike. I loosened the center compression bolt and the two side stem clamp bolts and it came loose where I can adjust it up or down but, there's nothing to tighten the slack up below. I did some research. My original post here was to add or remove a spacer. I think you can remove a spacer to lower but, I don't think the stem is long enough to add another one. I've seen they sell an extension that you can add-on to make the handle bars higher.

Jun 25, 2012 | Schwinn Cycling

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To what torque do I tighten the four stem bolts for an EastonEA 70 handlebar stem; is it the same 5nm marked for attaching the stem to the steerer tube? Paddy

Using a torque wrench with an appropriate hex key, tighten the face plate bolts, in one-turn increments and in rotation, to the torque specified on the clamp surface of the stem. For four-bolt clamps, use a cross pattern tightening sequence. For two-bolt clamps, alternately tighten each bolt one turn at a time.

The clamp surface area means the part of the stem, (not the faceplate), on which the handlebar will rest.

Mar 12, 2011 | Cycling

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My bikes handlebar's keep unloosening I looked at it and the part that keeps the handlebar together is broken. I was wondering how would I fix it cause I looked online on how to change the stem but I...

You are correct that you need to replace the stem, you can not fix a broken stem.

Since you have a replacement stem you may want to take both the bike and the replacement stem into the bike shop and have them do it. It will be fairly quick to replace. There are a number of different types of stems and a couple different diameters that have to be matched up.

The two main types of stems are:
1) type that fits via a neck into the frame
2) type that clamps around the steerer.

You may have a stem that clamps around a steerer. If there are 1-2 screws on the back side of the stem, near the bend, then you have a clamp style. This stem you just loosen the bolts and the top cap and lift straight off. Of course if your replacement stem is not the same type it won't work.

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How do u raise handlebar heigth on f400 bycycle

There are only a few ways to raise the height of your handlebars (the actual grip portion you hold onto)

1) - Raise the stem. How this is done is determined by what type of stem you have.
A. If the stem is inserted via a shaft into the frame, then you must loosen the bolt in the center of the shaft to raise and lower the stem. This has limitations (a line on the end of the inserted portion of stem) you can not go past the max insertion line. If you need it higher, then you need a new stem that allows for more height.
B. If the stem clamps around the fork steerer, then you can only raise the stem as high as the end of the fork. In some cases you can invert the stem for greater height. If you need greater height, then you will have to replace the stem with one that has greater angle.

2) - Replace the handlebars with ones that place the grips higher relative to where the bars clamp to the stem.

In all cases this would be a good project to take into your local bike shop, show them what you have and ask them for the best solution to raising your handlebars.

Things to keep in mind: When you raise the handlebars you increase the distance from the controls to the brakes and derailleurs. If you want to raise past a certain point you will need to replace your cables and housings as they will need to be longer.

DO NOT RAISE ANYTHING ABOVE THE LIMIT LINES: This will cause the bike to be unsafe and could fail causing a serious injury or worse.

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I can't get the handlebars to lock in to the forks, any ideas?

You haven't given me much to go on, but a common problem is to mis-identify where to tighten. There is a large nut (about 1-1/4 inch) that is the locking nut for the headset (which is where the bearings are that allow the fork to turn and steer the bike). This large nut does not tighten the handlebars. Rather, there is a long bolt that travels straight down through the handlebar stem. The handlebar stem is the bar that clamps to the middle of the handlebars and extends vertically down into the headset. At the bottom of the bolt (where you cannot see it) there is a wedge shaped nut. When you tighten this bolt the wedge nut jams itself inside the tube which is the top of the forks inside the headset, thereby locking the handlebar stem to the the forks. The head of the bolt you need to tighten can have a variety of shapes - could be an ordinary hex head, or it may require an Allen wrench (hex key). There are lots of different styles, but if you Google images of "handlebar stem" you will get the idea. good luck. Al K

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Here is one manual: Here is a much more detailed manual: It looks to me as if the handle bar stem has to be up high enough so that the end of the stem will clear the fold when you fold it down. Otherwise the stem will be down inside the bike and it won't be able to fold. If that makes any sense.The better manual has good pictures and diagrams and explains the locking mechanisms a lot better. Please rate me if this helps.

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My daughter wrecked on her Mongoose r2261wm and now the handlebars just spin. We can't see any obvious breaks or loose/missing bolts. We're thinking it must be something inside the fork where the bar goes...

There should be a bolt on the frame at the base of the handle bar stem. There should also be a bolt on the top of the handle bar stem. If these are both tight and secure. The odds are the expansion clamp that's connected to the base of the handle bar (part that goes into the frame) has broken.

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Problems with vitesse

Good bicycle shops carry extenders for just this purpose. They will be glad to help you fit your bicycle to your needs.

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Handlebars loose

Construct shims from aluminum (soda / cola) cans with scissors. Be careful not to cut yourself, sheared aluminum is very sharp. After you have cut a wide strip of aluminum, wrap it around the handlebar and put it between the handlebar and the clamps. This will increase the diameter of the handlebar and allow your clips to exert more pressure on the handlebars making them tighter. Try not to leave any aluminum exposed after fixing it; it's sharp.

Jun 15, 2009 | Dahon 7 Speed Folding Bike

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