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Why is my motor cycle chain get tight and loose

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Badly worn sprockets, stretched chain, worn chain, out of round sprockets ( not concentric with the hole or loose)

Posted on Apr 20, 2015

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Posted on Jan 02, 2017

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Tighten a chain on a2004 kymco 300 mongoose


Loosen rear axle nuts.
Pull back on the rear wheel until the chain is tight, then move forward just a bit and tighten both sides with your hands at the same time. Try to keep the wheel centered.
Tighten the right axle nut, center the wheel and then tighten the rear.
Turn the crank slowly. The chain should have slight play at the tightest point in the crank rotation.
If the chain is too tight or too loose loosen the right nut and move the axle forward or back, tighten and retest.
When tension seems OK loosen left nut and center the wheel, then retest.

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

May 01, 2018 | Mongoose Cycling

1 Answer

How do i get the chain back on the bar???


It depends on how it came off. Was it way too loose? Undo the two nuts holding the bar to the motor, slip the bar off the tapered tang that is part of the chain tensioner, put the chain on the bar and around the drive sprocket/gear. You may have to loosen the tensioner screw located on one side of the bar to have enough slack to get the chain on correctly. Reinstall the bar and holding nuts (loosely at first) and adjust the chain tensioner screw so that the chain is tight enough that can pull up on the links in the center of the bar but not loose enough so that the links come comepletely out of the bar slot.

Sep 01, 2013 | Husqvarna Garden

2 Answers

How much slack should be in the chain


If you tug on the chain in the middle of the guide, the guide teeth should come out of the guide bar groove with a gap of about 1 - 2 mm (about 1/16 inch). This is from the Ryobi Users Instruction Sheet, please rate this response.

May 21, 2011 | Ryobi Factory Reconditioned 18" 40cc...

1 Answer

Chain jammed on plant won't run after pulling most of plant from inner part of chain. Makes humming noise


The humming is the motor trying to turn. Remove the drive end cover from the bar and chain--back off the chain adjustment CCW several turns. If the saw has a chain brake, release it. When the cover is loose, remove the bar and chain, inspect the entire mechanism for any damage--particularly the chain itself. Run the motor without the bar and chain, and check for oil oozing out of the side port in the motor case where the bar fits. To reassemble, fit the bar in place after cleaning the small oil passages in the drive end, then fit chain over the sprocket. Pull the bar outwards to tighten the chain, then fit the cover and fasteners finger tight. Adjust the lower run of chain up to the bar (the lower run of teeth cut toward you), but not so tight that you can turn the chain by hand. Tighten the fasteners and recheck chain tension. Chain saws don't seem to like cutting hedges and other small branch, but tough bushes and the like. Make sure the chain teeth are properly sharpened. Hope this helps!

Jun 24, 2010 | Remington 16" Electric Chain Saw

2 Answers

Chain tightens


For your safety DO NOT leave part of the drive link exposed no matter what some so called expert recommends.

Normally if the nose is not held up when adjusting a chain it slackens. Are you sure the oiler is working? Hold the nose 3 - 8" above a surface (newspaper works well) rev it up a little. You should see a line of slung off oil slowly appear. If excessively tight to begin with, friction may be causing this.
Chain Adjustment
  1. Make sure the chain brake is off (gloves will protest your fingers).
  2. If necessary, loosen the bar nuts that are clamping the clutch cover in place (or whatever holds the clutch cover and bar on). They do not need these really loose - finger tight will do.
  3. Ease the tension adjustment until the chain is obviously loose.
  4. Using one hand, hold the nose of the bar up.
  5. While holding the nose up, adjust the tensioner so that the center of the chain just touches the underside of the bar, add a touch more.
  6. Continue holding the nose of the bar up & tighten up the bar nuts / bolts / quick-release system.
Dale this is a safety item. I suggest you take your saw and cup of premium black coffee to one of your local chainsaw outlets. A sales person should be willing to demonstrate (gratis but no promise) proper tensioning. Buy a couple of replacement chains or some 2-cycle oil while there as a thank you. Please reply below with what you find. Good Luck. HTH
Lou

Feb 26, 2010 | Poulan P3314 14" Gas Chain Saw 2.0 Cuin...

1 Answer

My chain keeps getting loose....is that normal?


On a new chain perhaps. One that has been in service for a while the stretch should be adjusted out. Not holding the nose of the bar up as you tighten the bar nuts is the usual cause of this malady.
Chain Adjustment
  1. Make sure the chain brake is off (gloves recommended).
  2. If necessary, loosen the bar nuts that are clamping the clutch cover in place (or whatever holds the clutch cover and bar on). They do not need these really loose - finger tight will do.
  3. Ease the tension adjustment until the chain is obviously loose.
  4. Using one hand, hold the nose of the bar up.
  5. While holding the nose up, adjust the tensioner so that the center of the chain just touches the underside of the bar, add a touch more.
  6. Continue holding the nose of the bar up & tighten up the bar nuts / bolts / quick-release system. HTH
Lou

Jan 14, 2010 | Ryobi Factory Reconditioned 18" 40cc...

1 Answer

I am having a problem with the chain on my poulan chainsaw. the chain comes loose or comes off after just a few cuts. am i missing something or could it be a malfunction


It sounds like the chain is not being set quite tight enough. Turn the tightening screw until the chain barely lifts above the bar when pulling on the middle of the chain.

May 11, 2009 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Chain


you need a new chain & most likely sprockets. Motorcycle chains don't stretch evenly.

Nov 20, 2008 | 2004 Honda Fusion Type X

1 Answer

Poulan Farmhand chainsaw chain tightens too tight for motor to move chain


Make sure the chain is not over tightened. When adjusting the tightness, ensure there is at least 1/8" of looseness by pulling up on the chain in the middle of the bar and releasing it. If a chain becomes overheated because of leaning on the saw when the chain is dull, or lack of oil on the chain, it may expand in the track and not turn freely.
Marlyn, Mountain, Ont. Canada

Oct 02, 2008 | McCulloch 16 In 4.5 Hp Electric Chainsaw...

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