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Nearly lost my chain!!!!

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This topic contains 16 replies, has 0 voices, and was last updated by  murph the surf 14 years, 7 months ago.

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  • September 5, 2010 at 10:00 am #98923

    Mal
    Member

    While preparing the bike for Nundle tonight I was tensioning the chain and could hear a clicking noise while spinning the rear wheel. After looking long and hard from every angle at the chain I found this at the joining link.
    I have already removed the link. You can see there is a roller missing.

    Chain1.jpg

    The bush has worn through to the link pin.

    Chain2.jpg

    The link was flopping around on the chain and for good reason, it f@#ked. I’m glad I found it as the link was not far from removing itself.

    Link1.jpg

    I removed the chain and measured it according to the manual and it’s very close to the end of its life. $165 chain put on in April. It would have about 2000km on it. I won’t buy another one as I’m not convinced the flat ring seals perform very well.

    Chain3.jpg

    Front and rear sprockets are shagged as well. The front sprocket was removed last week before a ride and replace with the spare 14T I have.

    Sprocket2.jpg

    Sprocket1.jpg

    Now I have replaced the damaged link with a new one and put two joining links on for the Nundle ride. I will be taking new chain and sprockets with me just in case the chain fails, but I doubt it will. The only reason I’m doing this is because I’m riding on the beach on the way back from Nundle and I’m not about to spend a heap of money on new stuff only to trash it on the sand.

    September 5, 2010 at 10:11 am #187006

    alan
    Member

    what brand of chain is it mal 2000 klms you must be on the gas but it has been wet this year the slop is hard on the gear including wheel bearings. i have been running did x ring chains because there resonably priced and easy to fit but the last ones rollers were very sad when i replaced it :huh:

    September 5, 2010 at 10:42 am #187008

    Mal
    Member

    It an RK “U”(Ultra)- Ring Chain, GB520KZU.

    Yeah Rocket I put it down to the wet as well. I’m not a hard rider and never had a chain do that before. I think the ‘U’ ring system is more for the motorcross guys who would rarely ride in muddy conditions longer than 20mins before the bike gets a wash.

    September 5, 2010 at 10:56 am #187011

    glenn
    Member

    good catch Mal.. I was giving the Narnys rear wheel a clean up this arvo before putting it back on and I just happen to grab the sprocket and bugga me dead if the ruddy thing was loose, Every bolt required tightning.

    Lucky me I recon :ohmy:

    Boony

    September 5, 2010 at 11:02 am #187012

    alan
    Member

    lock tight boony and do them up f88king tight lucky you hay

    September 5, 2010 at 11:03 am #187013

    Greg
    Member

    Thanks Mal for the heads up your a champion I have one of those chains in my set and I reckon your right they would suit the moto-x boys. I was thinking about one for Camerons but will use a X ring now instead

    Boony ALWAYS check your sprocket bolts, loose bolts break hubs and hurt riders check them everytime you do your air filter

    TB

    September 5, 2010 at 11:09 am #187014

    Mal
    Member

    Very lucky Boony. That could turn into a nasty mess. :ohmy:

    As rocket and TB said get some loctite on them and check them after every ride. Disc bolt as well mate.

    September 5, 2010 at 11:16 am #187016

    Greg
    Member

    On the subject Boony if it has been loose for a while and caused fretting on the mounting surface for the sprocket you will never keep them tight again :huh:

    If you do them up f*#king tight as someone said you can start the bolt stretching and they will come loose even quicker. Locite, good bolts and replace them every other sprocket and make sure they are tight but DONT stretch the bolt as they will loose their re-tension ability and keep coming loose or snap

    TB

    September 5, 2010 at 11:53 am #187017

    Alex
    Member

    Yep I was just thinking that myself TB. This happened to me once also. New bolts no excuses, as the bolts will be damaged and will elongate your hub holes more when they come loose again.

    September 5, 2010 at 8:45 pm #187018

    glenn
    Member

    Guess what i`m doing in the man cave tonight,,it will involve a allen key,12mil spanner,bottle of loctite,and maybe a beer.

    Boony

    September 5, 2010 at 8:51 pm #187022

    Greg
    Member

    Maybe grab some new bolts of Steve as those have been stressed

    September 5, 2010 at 10:05 pm #187023

    Jeffrey Smith
    Member

    I got caught out with a loose sprocket once, I put a new sprocket on and went riding in the bush about 10km from my place. While I was riding around I could hear the occasional rattle sound but couldn’t work out what it was until it was too late. By that time I was down to 2 bolts and in those days I didn’t carry any tools. I managed to do one all the way up finger tight but couldn,t moove the other one. I tried to ride home nice and steady but only managed to get out to the road and about 1 km on the tar before I ripped one of the lugs off. Had to ring my son to come and pick me up but not before I had pushed the bike about 5km to get reception.
    Welded the hub to build it up and make a new lug and put a new sprocket on, tightened it up good I thought, then after I put the wheel back on decided to recheck the bolts and was able to get another full turn out of each one. When I tightened them the first time I was turning the bolt and holding the nut. Problem with that is the the tapered head of the bolt starts to bind on the recess of the sprocket making it feel like the bolt is tighter than it really is.
    So long story short, make sure you do the tightening on the nut and not the head.

    September 6, 2010 at 4:15 am #187007

    Roy
    Member

    Mal,

    What’s causing the rub mark on the red part of the rear sprocket. Seems odd, to low to be the chain and I would have thought the width of the chain would have stopped the chain slider from rubbing there.

    September 6, 2010 at 5:32 am #187052

    Mick D
    Member

    Bundyroy wrote:

    Quote:
    Mal,

    What’s causing the rub mark on the red part of the rear sprocket. Seems odd, to low to be the chain and I would have thought the width of the chain would have stopped the chain slider from rubbing there.

    Bundy, I had a similar mark on my old sprocket and it was caused by a stone caught in the bottom chain guide. That would possibly explain the mark on Mals sprocket too

    September 6, 2010 at 10:55 am #187053

    murph the surf
    Member
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