chain help!
 

sorted the slack on my chain today did about 35 miles.
checked it again and its really slack again.
its done this a few times. do you lot think i need a new chain?
theres still 6marks on the chain ajuster.

Re: chain help!
 

check the slack on the chain in two ways...
first see if the chain can be pulled from the rear sprocket at the 3 oclock possition, if so then maybe time for a new chain.

and

check chain on the longest length looking for 20-30mm deflection.
then, move the bike forwards 12 inches, or if on a paddock stand turn the wheel 1/4 turn and check chain again, repeat this till you've done the entire chain length..

did the chain get tight and then loose ? if so then time for new chain and sprockets...

ps, the rear axel nut is tighten'd up to 100 Nm

Re: chain help!
 

Richie, without a torque wrench, is it possible to say just how tight 100nm is? Is it good'n'tight or just as tight as a hefty bloke can do with an average spanner?

Re: chain help!
 

I'd say a spanner 10 inches long with all your weight on it...( 13.5 stone) ie stood on it.

Re: chain help!
 

I wouldn't wait until you can pull the chain all the way off the rear of the rear sprocket. That would be waiting far too long. I'd say if you pull the chain as described by Richie and see half a tooth, then it's time to change the sprockets and chain.

Always tighten the chain to the specified slack (20-30 mm as mentioned by Richie) to the tightest part of the chain. If you do have any tight spots on the chain this is going to increase the wear rate.

Normally, once you start having excessive wear on the chain, it's a short journey from wear to snap. If your not sure, find someone that has more knowledge and get a 2nd opinion. Don't leave it too long to change it if it is knackered.

Re: chain help!
 

See question one


also as Bigape said.

Re: chain help!
 

think i will order one tomorrow hope i can get it sorted for next weekend.

Re: chain help!
 

Whoa there numbers mate. This guy has a curvey, not one of your ugly pointy things
http://www.twsoft.co.uk/sv/torque.png

You have just told him to either strip the axle thread or severly dent his swinging arm. 65Nm is the recommended torque

Re: chain help!
 

Pete I have a torgue wrench. More than welcome to pop to Urmston to check if it is tight enough. I think my hornet only needs 70nM (maybe its 90 but I am too lazy to check right now) and even with the wrench (big and heavy) it needs some force to be used! Not sure you can do it with a ordinary spanner ?

Re: chain help!
 

Hmmm puts to the test

13.5 stone = 189lb = 85.7kg

10" = 0.254m


Long time since I did any of this....
gravity 9.81 ms-²

85.7 *9.81* 0.254 = 213.54Nm

Whoops over tourqing again.

I guess Pete needs to stand about 5inch from the nut