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What is wrong with my bike's gear shifting?
#1
my brand new mountain bike's shifting is very bad. the chain keeps moving between gears by its own and it doesnt shift right when i want it to. i must keep holding on the shift down hand a bit so that the chain stay in place.
i thought messing a bit with the limit screws would solve it but i think i have over done it and made it worse.
what should i do?
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#2
Limit screws do not have any effect on shifting between gears. A brand new bike will generally have free adjustments available for 30+ days - best to take advantage rather than risk messing up and maybe voiding the warranty. If you bought unassembled then consider a bike co-op for help if there's one nearby.
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#3
I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.
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#4
(10-13-2014, 09:34 PM)Old Retired Petty Officer Wrote:  I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.

If the levers move the derailleurs it's often just a matter of adjusting the cable and perhaps some lubrication. Bike co-op can help if you have one nearby, videos on this site are supposed to be pretty good, but I suggest you look at written instructions on a good site first. Google "adjust (front/rear) derailleur" - sheldonbrown.com and parktool.com sites are recognized as being the best.
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#5
(10-13-2014, 11:06 PM)cny-man Wrote:  
(10-13-2014, 09:34 PM)Old Retired Petty Officer Wrote:  I have a 6 year old Next 18 speed mountain bike and it is not shifting at the rear very well and the front only works on two sprockets. It had been sitting for a considerable time outside. I rode it three days per week for about 8 to 10 miles for exercise. I had to revert to walking because of it.
It the cost of repair exceeds what I paid for it, I plan to let it go to charity.

If the levers move the derailleurs it's often just a matter of adjusting the cable and perhaps some lubrication. Bike co-op can help if you have one nearby, videos on this site are supposed to be pretty good, but I suggest you look at written instructions on a good site first. Google "adjust (front/rear) derailleur" - sheldonbrown.com and parktool.com sites are recognized as being the best.

Thanks for the info cny-man!
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