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This depends on what forks are fitted. Adjustment is usually done on the top of each leg. Look at the very top of each leg. if it is a flat plastic cap it is not adjustable.
If there is a twist top or a large nut shaped cap the forks will have some adjustment. Some forks can only be adjusted by changing the spring or Elastomer insert to a different rating.
These parts are usually quite cheap and can often be bought as a fork service kit.
Understanding Sag
In order to let the suspension work properly, we allow some of the rear-wheel travel to be used when supporting the rider's weight, this is called 'sag'. The basic idea is to have around 10-20% of your bike's total travel as sag. This allows the rear wheel to drop into dips in the trail and maintain contact and traction.
Adjusting Sag on Rear Suspension
Changing the amount of sag in the rear suspension is done by increasing or decreasing the spring rate of the rear shock. The rear shock's body is threaded and you will notice there is a nut on one end of the spring. Turning the nut in the direction that compresses the spring will increase the spring rate and reduce the amount of sag. Turning the nut in the direction that expands the spring will decrease the spring rate and increase the amount of sag. Never turn the nut to the point where there is space between it and the spring, this may cause damage to the shock.
Results 1 - 15 of 15 - Mongoose XR 150 mozo m30 front forks rebuild. A quick ...Mongoose mozo m30 forks are sponggy on my XR150 mongoose mountain bike.
Feb 20, 2006 - 15 posts - ‎6 authors
... of a mozo m30? is it the junk im assuming came on my mongoose? ... into a halfway decent bike. and all i can get off the fork is mozo m30 ...
There is probably not a single thing on that bike that is specific to Mongoose. In other words, every adjustment and component on it is in accordance with the third-party manufacturer's specs.
One side of a center-pull brake can be adjusted by tightening or loosening the cable itself (the side with a screw holding the cable in place) The other side will have a small screw to adjust the tension on the spring. Sounds like you need to adjust your spring tension screw.
Give it a full (360-degree) rotation and work the brakes a few times. If the problem is worse, then you need to adjust it the other way. If it's getting better, then you're getting closer. Make several small adjustments, and work the brakes a few times after each one, and you should be all set.
The front forks aren't adjustable, as you probably figured out. You can, however, get harder springs if the springs can be accessed at the top of the fork tube. If not, do what I did on my mountain bike. I bought a better pair of adjustable forks that I found on eBay. It will take a bit of investigation on your part regarding the dimensions of the forks, so you get the correct length and width where the forks fit onto the frame (and the overall desired fork length), but you'll be a lot happier with adjustables.
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