Any advice?

[shunt]

I have a 2001 alp and recently changed the rear disc and pads. I gave the chain a tweak as well as a bit slack. All went back in order it came off. Since then back of bike seems to start vibing badly after about 10 miles and chain needing tightening every week?! Turn it off and fine again until hit the 10 mile mark. Have worked through other bar vibes and stuff but can't seem to suss this one . Wouldn't mind too much but this is work bike and sees about 10,000 miles a year and can't have my fat arris bouncing around all year...might tone it though hmm......

Any help much appreciated folks.

[africajim]

I'd hazard a guess and say chain too tight, causing vibes and stress stretching it?
Chain has to be set with weight on the bike, otherwise will tighten when you sit on it. Hope there's no damage to output shaft bearing, check tension and all will be well. Did it once on an @T, many yrs ago!

[raymo]

I gave the chain a tweak .

with jim on this one ..

tight chain ( hopefully as its a simple fix.. unless it has lead to mischief??)

check at a few points...


a slack chain is better than a tight one..

How are you lubing it?

ran out of chain lube once on a real long wet trip and chain was well stuffed and causing vibs.. as it had worn the sprockets too ( you should replace chain & sprockets as a set ).

[StumpyFingers]

Wot the others say chain is too tight.

[BobA]

Generally, if the chains looks slack, it's probably OK!!

As all the others have said, slacken the chain off and start again, before you find the gearbox shaft is stripped and you're facing the cost of an engine rebuild! It won't take many miles with an overtight chain to wreck the output shaft.

[tramp]

yeh agree with the above,
and also these chain very rarely need adjusting maybe once when new and more when there knackered, the salt this winter is taking its toll even with the water wash downs,

God I love these full time bikers

[davedixon]

Sit the Mrs on the bike then check the chain. Its the only way.

[btbloke]

How did you adjust the chain in the first place?
The chain must be adjusted with no weight on the bike just the weight of the bike itself against the suspension.You can check if it's too tight with someone sitting on it, don't adjust it with them on.
The way I do it is to stand the bike up so it is leaning against a wall (you could get someone to hold it up for you) in gear and rolled backwards so the chain is taught at the top and slack at the bottom, I then undo the rear nut on the spindle and then I adjust the chain so it has the correct slackness (I allow about 40mm in the middle area between frame and rear sprocket), check the adjustment markers on both sides are at exactly the same amount and redo the nut on the spindle and check the locking nuts are tight. Job done, how have you been doing it?

[davedixon]

When the bike is in motion somebody has to be sitting on it dont they?

[twistgrip]

On my Vigor I put the bike on the paddock stand, rotate the wheel to find the tight spot in the chain (if there is one) then I just adjust it to the slack as per the handbook. Look for a tightspot in your chain and adjust it there. Good luck