Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Chain is too loose. how tight should it be? - Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Chain should be approximately 1/4 inch above the bottom of the rail. If you over tighten the chain will make a clicking noise when the opener runs. This is not good.

Posted on Dec 28, 2010

Testimonial: "Thank you for your answer. I will adjust it to that tightness. Carl Benson"

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Chain coming loose


Yes. Loosen the two nuts on the back wheel. When they are loose just pull the wheel back until the chain is tight enough and tighten nuts while holding the tire in the proper position at the proper tightness of the chain. Make sure that the tire is running true when tightened.

Jun 24, 2012 | Dynacraft Cycling

1 Answer

I need to tighten my chain on my fzr 1000,its a 1987


The first step is to find the tightest part of the chain. Unless it's a brand new chain it will have a tight spot somewhere on it. It's easiest to do this with the bike on a race stand if you have it. Rotate the wheel and observe the lower part of the chain and watch it lift up when you hit tight spots. The spot where the chain lifts highest is the tightest part of the chain. Once you have found this spot, grab the chain on the low side under the swingarm and move it up and down. It should move up and down around 30-35mm or so, or an inch and a bit if you're an imperialist :) If the chain moves more or less than this then it needs to be adjusted.

To adjust the chain, you need to loosen the axle first. Don't take the nut off but it has to be loose enough to undo by hand. Using 2 spanners, unlock the lock nuts on the end of the swingarm and wind the nut in or out until you get the correct amount of chain slack. always do the sprocket side (left side) first, then repeat the same on the other side. Check the chain adjuster marks to make sure that the adjusters are equal on both sides, this will make sure your rear wheel is aligned properly.

Once you have adjusted the chain, tighten the rear axle and check again. The chain slack will change slightly after you tighten the axle, it might go tighter, it might go looser. Depends on the bike. But the chain slack must be correct with the axle tightened. A bit of practise here and you will be able to guess the correct amount before tightening the rear axle.

Once you have the slack set correctly and the axle is tight, make sure to tighten the adjusters. Tighten the front nut first against the swingarm plate so it can't move. Do it tight but not crazy tight. Then holding the first nut so it can't move tighten the locknut against the first nut. Repeat this on both sides.

If you are not quite sure if the chain is right, always err on the side of making it too loose rather than too tight. Running your chain too tight can destroy your output shaft bearing. It's only about $30 or so for a new one but your engine needs to be completely stripped down to replace it, it's not a fun job. I have seen a lot of FZs and FZRs have this problem because people ran chains too tight. If your chain really is too loose then it will start making your gear changes harder to do, that's the sign you need to tighten it.

Feb 14, 2011 | 1987 Yamaha FZR 1000

1 Answer

The chain will not stay tight. After about i minute of cutting the chain gets loose and jumps off of the bar. I tighten everything really tight after adjusting the tension. It runs and cuts fine until...


On the aduster screw where you tighten blade ... is there an extra nut? I think you need to screw that nut tight so the adjuster screw cannot rotate from vibration.

Oct 08, 2010 | Homelite Garden

1 Answer

Chain wont stay tight


Is the chain being properly oiled? Make sure the cover fasteners are tight after adjustment. If the chain is dull or is improperly sharpened, it will heat badly causing the chain to become loose. Adjust the chain (cover fasteners finger tight) so that the chain just comes up to the lower bar, but not so tight that you can't pull the chain by hand. Make sure the teeth cut toward you on the bottom run. Run the engine at speed with the bar tip near some cardboard for a few moments, it should throw off a thin line of oil onto the board. Hope some of this helps!

Jun 23, 2010 | Poulan Pro Chain Saw 46cc 20"

1 Answer

I am in the process of changing timing chains on a 2005 suzuki boulevard c50t. I was wondering what the maximum stretch of the chains are. I am thinking it might just be the tentioners too. The weird thing...


The cam chain it stretched, just like a drive chain. It should not have any tight spots, or loose spots. Replace the cam chain and look into aftermarket cam chain adjusters like APE. Chaz Moto DC

Jan 22, 2010 | 2005 Suzuki Boulevard C50T

1 Answer

I have a '99 kawasaki vulcan 800, it has a rubbing sound near the back wheel and chain/sprocket area...could this be that the main bolt on back wheel is too tight.


Tighting the bolt very tight is OK but over doing it can collaspe the spacers. It's more likly that if loosing the bolt corrects the problem it's been put to gether wrong. Look at the bike bandit .com for your bikes rear wheel and see if yours has all the right parts in the right order. Maybe the rear brakes are worn out or something in the brake came loose. The chain and sprocket can make alot of niose. Axel not the same on both sides. chain dry or too loose or too tight. Chain gaurd touching chain or the tire. With the wheel jacked up turn it and work the brake to see if the noise changes. The wheel should turn very easy cheak breakes and chain for probelems wheel bears do fail but mileage needs to be high or wet.

Nov 28, 2009 | 1999 kawasaki VN 800 A Vulcan

2 Answers

How to tighten a loose chain


To tighten a loose chain you need to pull the cotter key pin from the rear axle then loosen but do not remove the nut. It just has to be loose enough to slide in the swingarm. At this point there are tension adjusters on the ends of the swing arm you tighten them to take the slack out of the chain. NOT TO TIGHT! You should have 1 inch of play in the chain this is up down play not front to back. I push the chain up the highest it can go and measure how far it falls. NOTE: TURN THE TENSION ADJUSTERS THE SAME AMOUNT THE SAME DIRECTION IF THE AXLE IS TWISTED YOU WILL THROW THE CHAIN. This can make for a bad six months!

Aug 19, 2009 | 1998 Suzuki VZ 800 Marauder

1 Answer

I have a poulan pro 260 chainsaw and just replaced the bar and chain. Tighten chain and brake nuts and after a few seconds of cutting the bar is shaking and the chain is loose. Switched back to the old bar...


check the cog that the chain runs on, the one on the back of the centrifugal clutch they are supposed to be changed when you change the bar ((i dont bother until iget symptoms like yours or the chain starts to get tight and loose tight and loose)

Jul 28, 2009 | Garden

1 Answer

Chain becomes very loose with little use


the problem with torqueing the nuts is that it's not enough tighting.i tell my customers that you need to tighten them as tight as you can get them.the nuts will not vibrate loose then.don't worry about breaking the studs they are very hard.

Feb 19, 2009 | Poulan Pro Chain Saw 46cc 20"

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