Replace crank bearings

SOURCE: loose handlebars on a Mongoose XR-75 mountain bike

Check the splines on the handle bar. Just loosen the "clamp" and slide the bar over to one side enough so you can tell if the are stripped or not. If they are then replace the bar, if not then reassemble and try to put a littlle extra torque on the bolt.

I have noticed with the 2 of these bikes that I have that the bars do not like to stay tight for long, they tend to work thier way loose about every other time we use them. I just keep tightening them untill the splines strip, then pick up a new bar.

Contact Mongoose for parts info at: www.Mongoose.com under "about" click ask mongoose.

Good luck.

SOURCE: Adjust front suspension on a Mongoose XR-75

i dont think you can......because these bikes are made for confort at a cheap price..........

higher value bikes can be adjusted....they have special shocks and you can adjust on either soft or stiff ride.....

SOURCE: front suspension to soft on mongoose xr-75

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.

SOURCE: mongoose tactic mountain bike / loose crank on

The crank has to be removed to tighten the nut that holds the gear on. I assume that is your problem is with the chain gear on the sproket that is loose

Testimonial: "I need a special tool to remove crank /nothing Ive ever seen"

SOURCE: How do you tighten the

there is a spring tesioner but probally need to take a link or two out of chain

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