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When i push the thumb control down the motor comes on and the chain turns but the rear tire does not what is causing this? thank you

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  • 18 Answers

Sounds like you need a new rear wheel as the wheel locking mech has been stripped or damaged where the cog is at. Can you move the wheel forward and backward with out the chain moving? If so that is your problem.

Posted on Nov 09, 2010

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Posted on Jan 02, 2017

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SOURCE: when i push the thumb

If the sprocket and chain turn on the rear wheel, it sounds like the freewheel on the rear tire is faulty.

Posted on Nov 22, 2010

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1 Answer

Chain will not stay on


Jessica:

First, check the chain and sprockets. Check the two chain sprockets for worn or bent teeth. If either of the sprockets is damaged, replace them. If the sprockets are OK, Check the chain for any damage If the chain is damaged, replace it. You are checking the chain for kinks, stiff links, damage to the link side connectors, and checking that the chain is not bent (side to side) Check to see If the chain is loose. If it is, you'll need to loosen the rear axle nuts and pull the rear tire backwards to tighten the chain, then tighten the rear axle nuts. *Make sure that the rear sprocket lines up with the front sprocket*. Just lay a straight edge along the two sprockets, ( A yardstick will do), and make sure that the sprockets touch the yardstick along the whole length of the sprockets. If the rear sprocket is cocked (not lined up with the front sprocket) loosen the axle nuts again and push on one side of the rear tire or the other side until the sprockets line up.
When you are finished tightening the rear axle nuts, pull up on the chain between the sprockets... the chain should not move up or down more than 1/8 of an inch. The chain will stretch over time, and you need to check the chain for looseness before riding.


Happy and safe riding!

Feb 01, 2014 | Razor MX500 Dirt Rocket

1 Answer

1986 sportster, rattle noise from by chain on the rear tire only when pushing the bike....


Hi Anonymous, make sure chain is not rubbing chain guard or tire. Adjust rear axel as necessary. Good luck

Aug 21, 2013 | 2003 Harley Davidson XLH Sportster 883...

1 Answer

I have a Huffy bike with a 48cc motor on it. The chain hits my fenders and now keeps popping off


which chain is falling off. the one from the motor? if so check to make sure the sproket (ps i cant spell) and gear fom motor is lined up. on mine i remember having to flip the rear sproket. are you using the chain tenchiner pulley? i think the one that comes with the kit dosnt have a deep enough gruve. i got rid of it all together, and just made the chain fit with like 1.5 to 3 inches of play. ive seen people use the tenchiner from the rear shifting gear on a mountain bike. thats what i suggest. if its the chain from your pedals thats falling of the the guys from the bike shop are messing with you or the alined the wrong chain. or maybe you need to resize the chian they just got the wheel straight.

May 02, 2012 | Huffy 26 in. Cranbrook Cruiser Bike

2 Answers

My shimano ultegra left shifter is super stiff/hard to push in; what is going on?


Try flushing out the shifter(s) with WD-40, use plenty. The next step will be replacing the shift cables and cable housings.
  • Take the bicycle in an area free of cars and obstacles, such as an open parking lot. Concentration is required when learning to use Ultegra shifters or any other type of bicycle shifter.
  • 2 Mount the bicycle and rest both hands on the proper Ultegra hand control. The left-hand control operates the front derailleur. The right-hand control operates the rear derailleur.
  • 3 Start pedaling, smoothly and evenly. While pedaling is crucial to propelling the bicycle forward, it is also necessary when shifting the derailleur. Pedaling forces the chain to rotate. The chain must rotate before it can transfer to another gear.
  • 4 Push the outside right Shimano Ultegra lever in toward the bicycle. The rear derailleur will shift the chain to a smaller rear gear.
  • 5 Push the inside right Shimano Ultegra lever in toward the bicycle. The rear derailleur will shift the chain to a larger rear gear.
Rear Ultegra Derailleur Control
  • 1 Push the outside left Shimano Ultegra lever in toward the bicycle. The front derailleur will shift the chain to larger front gear.
  • 2 Push the inside left Shimano Ultegra lever in toward the bicycle. The front derailleur will shift the chain to a smaller front gear.
  • 3 Use the front and rear Ultregra hand controls interchangeably. For small changes in gearing, using the rear control. For larger changes, choose the front control. A smaller gear causes the bicycle to travel a shorter distance per pedal stroke but also requires less energy to use. A larger gear requires greater effort but in turn causes the bicycle to travel farther per pedal stroke.

Oct 25, 2011 | Cycling

1 Answer

1991 harley ulra classic has stock heads but adjustable pushrods with no colors. how do i adjust before firing motor


Hello
I hope this helps out.
the 2 long push rods are the exhaust and the 2 short ones are the intake.
jack up the bike so the rear tire is off the ground.
put in 5th gear so you can turn over the motor by turning the back tire.
it takes 2 people, one to turn the tire and the other to be looking at the lifter to make sure it is at its lowest point.
you should have all push rods in but very loose.
start with the rear exhaust and then rear intake then front intake then front exhaust.
turn the motor over with back tire, looking at the lifter, watch to see it get to its lowest point.
when it is at its lowest point, stop turning the tire.
now tighten up the push rod so you can spin it but no up and down movement.
now tighten to push rod specs(factory or aftermarket have # of turns or flats to turn)
yours should be 3 turns, but check your manual specs or call dealer and ask how many turns for that year just to make sure.
after 3 turns the push rod will be tight.You have to wait about 15-20 minutes for the lifter to bleed down. try to spin the push rod after 20 minutes. if its hard to spin, wait 20 minutes more, if its hard to spin then you may have over tightened the push rod.
if the push rod spins freely but no up and down movement, then the lifter has bled down and your ready to move to the next push rod.
repeat this process with each push rod.
once done, make sure the spark plugs are out and turn the motor over a few times, as the motor turns over, have your buddy stop when you see a lifter at its lowest point and spin the push rod.
it should spin free with no up and down movement. check them all.
thats it.

just remember to make sure the number of turns for the type of push rods you have.
call the manufacturer who makes your push rods, or call the dealer if they are harley davidsion.

Note: there is basically zero lash once the bike is running, because the oil takes up the clearance.

May 21, 2011 | 2004 Harley Davidson FLHTC - FLHTCI...

2 Answers

Bought a 03honda cbr 600rr, front sproket had been changed out and rear tire moved back. chain is loose 2"+ in slack but i can not move tire back any further in swing arms. can I move rear tire up and...


hi, prob good idea with this will be to slacken off the wheel push the wheel forward and fit a chain the correct length for the set up you have, count the links in the chain you have on the bike and get one 2 links shorter, mark a link on the chain with paint or sim turn the wheel and count the link plates, ie 1 plate is 2 links, so start on the 1 next to the marked 1 turning the wheel counting the plates 2 4 6 8 10 etc and end on the marked 1 this will give you the number of links already on the bike

Jan 15, 2011 | 2003 Honda CBR 600 RR

1 Answer

When i push the thumb control down the motor comes on and the chain turns but the rear tire does not what is causing this? thank you


If the sprocket and chain turn on the rear wheel, it sounds like the freewheel on the rear tire is faulty.

Sep 28, 2010 | Razor E300 Scooter

1 Answer

How to use thumb shifters on a 21 speed Schwinn Highplains bike


OK, for a beginner in the world of 18 speed bikes, put the chain on the big sprocket up front, it should be about 46 teeth, make sure it is center and doesn't make noise, if it does, adjust it just a hair either way, now, the rear, put the chain on the big sprocket in the rear, make sure the front didn't start making noise, if it did, adjust it again. You are now ready to take off, in low gear, as you start out, it is easy to pedal, soon you will be peddling air, shift into second gear in the rear only, don't touch the front. Just a little push with the thumb will make it shift, now were going faster, easy peddling, shift into 3rd, then 4th, etc, coming to a stop, down shift the back sprocket back into low gear (big sprocket) and be ready to take off again. Soon you will be shifting that thing like a Ferrari! The front sprocket, will be used for moderate terrain, wheelies, and mountain climbing, that will come later, learn how to shift the rear first. As each gear climaxes, hit the shifter, it will get smoother as you go, and keep the chain quiet, no climbing on the next sprocket or falling out of gear. Hope this helps.

May 03, 2010 | Cycling

1 Answer

My crank/chain is skipping on my mongoose pro bmx. This just started when I was riding it, and it skipped. The chain is in the right right place and does not seem to be skipping place, but the crank is...


It seems you will need more tension on the chain. Place the bike upside down, loosen the nuts, grab a broom stick or bar and place it between the rear tire and crank housing straight up and down with the handle bars away from you, push the bar away from you. When done properly the tire will come toward you tightening the slack in the chain. While you hold pressure on the bar tighten the nuts and WALLA.

Dec 04, 2009 | Cycling

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