20 Most Recent Mongoose 20-Inch Gravity Games BMX Freestyle Bike - Page 2 Questions & Answers

Your wheel is probably bent and has to be trued. You cannot adjust your brakes without the wheel being straight. You will have to take it to get serviced unless you have a truing stand and a good quality spoke wrench.

Hi MonkeyManTim

Firstly, remove the centre lock nut on the stem. This loosens the stem/headset. Pull the handlebars up and rest them next to the front wheel, make sure the brake cables aren't being stretched too much.

You'll see there is a locknut on the headset (at the top of the frame/top tube where you pulled the stem from) and loosen this (might need a massive spanner!).

Pull offthe toppart of the headset, ball races and lower part. Replace with the gyro bottom and top parts. Grease the ball bearing if they aren't already!

Slide it together, fit the stem and you'll notice the brake lines that come with it. Undo the rear brake, run the splitter cable from the front lever to the top half of the gyro, same with the bottom half. I found putting some padded stickytape on the bars helped here as the splitter cable would 'ting' off the bars.

Undo the front brake and run it through the stem hole, through the forks and cable tie it to one fork leg.

Test the brakes, adjust where necessary and on you go pulling bar-spins for fun. Please don't land a jump with the bars half spun, it hurts....a lot!!

There are two ways to adjust handle bars on a bike. It's either by using a hex key at the top of the neck or loosening the octagon nut at the base of the neck near the body.

Hi, get them straight, then tighten the one in the middle nearest to you on the stem, it's called when you are sat on the bike, also there could be a 2 bolts on the side of them stem... let me know...

mark

Check your chain and see if you have a link that is stiff. If so, this can cause the chain to slip over the gears. You can try soaking it in oil or WD40 and once its free put some chain lube on it. Hopefull this will help. Good luck!

It sounds like you have cracked or broken one or both sealed cartridge bearings if thats what your bike has. If it has ball bearings in races they might be broken. Try loosening your rear wheel enough to take the chain off and then turn your crank. See if theres a funny noise or if it feels a little weird when its turning. If you broke a pedal bearing you should be able to tell just by carefully turning each pedal with your fingers and seeing what it feels like. In any case unless you have the tools to repair it you will have to take it in and get it repaired.

take the pedal off the opposite side that the chain is on the there should be two bolts turn the first one towards the back tire and take the washer out and use a flat head screwdriver to tae the second ne out the same way pull the first set of bearings out then pull it through the frame it might be a little hard but it will come out make sure you take the chain of the sprocket then put everything on the same way

Hello

Thank you for using FixYa for your problem


There are 2 types of sprockets and both need the removal tool, take the wheel into a cycle shop and they should be able to do on the spot for you. If you are planning to change the sprocket often it could be worth getting one yourself, I have brought one - easier now

Please rate our solutions and if you still have problems please call back for more ideas to help you

Thanks
Richard Scott
Technical Support
New Zealand

FMF Racing

Have a look at this site:http://www.bikeguide.org/how-to/brakes/brakes.php Also see this one:http://www.parktool.com/repair/readhowto.asp?id=144 Please rate this if it helps.

needs a new sprocket on the wheel the teeth inside are worn

Vise grips or a pipe wrench if theres not wrench spot at any place. Lefty loosey righty tighty 8)

This site might help:http://www.bikeguide.org/how-to/brakes/brakes.php

Here is the perfect site for you:http://www.bikeguide.org/how-to/brakes/brakes.php They're called gyro brakes by the way.

might be something to do with the postioning of the sprockets?

thank you for using Fixya. the issue you are experiencing is pretty much your free wheel. If it is new, it may have been installed the other way around or the clip in the assembly that serves as a spring for the chainwheel to lock out has been worn out.

Best if you will be able to remove the rear wheel and then check the whole rear hub assembly starting with the freewheel and the axle.

Yes, all bikes have handlebar height adjustment.

How to Adjust the Handle Bars on a Mongoose Mountain ...

DIY Mountain Bike https://www.diymountainbike.com > adjust-handle-bar... This is done by loosening the bolt and clamp on the front of the stem. Insert a 6mm Allen wrench into the bolt head and turn until the handle bars roll freely.

How to Raise Handlebars on Mongoose Mountain Bike

mtbrules.com https://mtbrules.com > how-to-raise-handlebars-on-mo... Oct 2, 2022 - You can adjust the handlebars from front to back by loosening the clamp bolt in the stem's front. Insert a 6 mm Allen wrench into the bolt head.

How to Raise the Handlebars on a Mongoose

SportsRec https://www.sportsrec.com > Fitness > Strength Training Jun 29, 2011 - Other options for raising Mongoose handlebars are adding a new riser bar, which can give 1 to 5 inches of height for your handlebars. A steer- ... Missing: maneuver ‎' Show results with: maneuver

Product Manuals

Mongoose https://www.mongoose.com > pages > product-manuals The Mongoose owner's manual contains important safety, performance and maintenance information. Read the manual before taking your first ride on your new ...

Hope this helps....https://shop.re-rides.com/blogs/news/mongoose-serial-number-for-bmx-mid-school-new-schoolAnother link...copy and paste...https://duckduckgo.com/?t=ffab&q=mongoose+bike+serial+number+decoderBest to you.

Yes, no problem. https://www.google.com/search?q=put+50cc+motor+on+mongoose+deception ..

https://www.mongoose.com/pages/product-manuals