jporter12 Posted August 18, 2009 Report Share Posted August 18, 2009 So.. am I to use the word stretch when I'm referring to my genitalia since it gets longer every time I think of Jbot in the shower?Uh, I'm not sure. I guess that depends on if it's getting longer on it's own, or if you're pulling on it.... Quote Link to comment Share on other sites More sharing options...
ReconRat Posted August 18, 2009 Report Share Posted August 18, 2009 (edited) You're a kind man' date=' Recon. Much kinder than I. That said, if the chain is in really bad condition there could be a substantial tension difference between one section vs. another at 180º opposite. So, the OP could have 'noticed' the chain tension at the tight end and never bothered to actually spin the rear wheel and check the tension at several sections. I'm leaning closer to that than anything else at this point. I think it's a simple case of oversight.. nothing more.[/quote']yeah, ok. But a chain in that bad of shape, should be recognizable, like you say. But it would probably have to come off to see that clearly. It is true about the loose spots and tight spots.I used to fold them over, doubled up, sideways, and see it both halves arched the same. Never did, chain was always shot if I was looking at it for wear.Edited: The technical way to measure wear, is to measure a certain number of them pulled tight apart. Exceeding a certain amount by a percentage, is worn out. All the 520, 525, and 530 are 5/8" between pins. Somewhere there is a chart for that... Edited August 18, 2009 by ReconRat oops... Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 18, 2009 Report Share Posted August 18, 2009 (edited) yeah, ok. But a chain in that bad of shape, should be recognizable, like you say. But it would probably have to come off to see that clearly. It is true about the loose spots and tight spots.I used to fold them over, doubled up, sideways, and see it both halves arched the same. Never did, chain was always shot if I was looking at it for wear.The technical way to measure wear, is to push the links together, and measure a certain number of them, and then pull them apart and measure again. Exceeding a certain amount, is worn out. Somewhere there is a chart for that...I'm pretty sure my manual says count 21 pins (I would assume differently for other link count chains?) Then rotate 180 and check again. Wear out is 12 1/2". Wouldn't it be the same for all chain drives minus the pin count and the exact wear measurement? Wouldn't 3-4" basically be falling off the rear sprocket? I would absolutely be noticeable. Please inform me:confused: Edited August 18, 2009 by Lost1888 Quote Link to comment Share on other sites More sharing options...
ReconRat Posted August 18, 2009 Report Share Posted August 18, 2009 (edited) I'm pretty sure my manual says count 21 pins (I would assume differently for other link count chains?) Then rotate 180 and check again. Wear out is 12 1/2". Wouldn't it be the same for all chain drives minus the pin count and the exact wear measurement? Wouldn't 3-4" basically be falling off the rear sprocket? I would absolutely be noticeable. Please inform me:confused:I did go back and edit that measurement thing...Yes, constant velocity chains go 2% over before worn. Motorcycles are probably closer to 1%. The GSXR1000 manual says "Count out 21 pins (20 pitches) on the chain and measure the distance between the two points. If the distance exceeds the service limit [319.4 mm/12.57"], the chain must be replaced." That would be 0.6% stretch.That should work for all 5/8" links, the 520, 525, and 530. Smaller chains would have a different measurement to check with.edit: YZF-R1 manual. It recommends the measuring of 10 pitches method but uses 5.91" as the service limit. This is a .96% stretch.@ IP, I saw that website, that looks like a good explanation of how it's done. Edited August 18, 2009 by ReconRat moar Quote Link to comment Share on other sites More sharing options...
420gsxr1000 Posted August 18, 2009 Report Share Posted August 18, 2009 my bike does that pisses me off everytime put a screw driver in the chain between the chain and the rear sproket.....rotate so it "tightens" the chain when you rotate wheel so its on the rear sproket under the chain, that tightens the axel up against the adjusters, check alignment of adjusters and tighten axel nut ....all donr and even as long as the adjusters were even, or check to see if chain rides in center of links...as for the origoinal magical chain shrinking, time for a new chain either way, or you have a larger sproket on there.... Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 18, 2009 Report Share Posted August 18, 2009 (edited) First time I hear of that screw driver trick was from Canyon Chasers in this video. 4:23 http://vimeo.com/5409516 Edited August 18, 2009 by Lost1888 Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 19, 2009 Report Share Posted August 19, 2009 Any word on your problem yet? Maybe some pics. Quote Link to comment Share on other sites More sharing options...
wrillo Posted August 19, 2009 Report Share Posted August 19, 2009 this doesn't sound right... I hope that everyone on two wheels would notice if their chain was about to fall off. Are you sure you put the axle assembly together correctly? Did you forget to put the rubber damper for the cush drive back in? Missing any washers or spacers? Did the chain slack adjusters get rotated in the swingarm? Quote Link to comment Share on other sites More sharing options...
dustinsn3485 Posted August 19, 2009 Report Share Posted August 19, 2009 this doesn't sound right... I hope that everyone on two wheels would notice if their chain was about to fall off. Are you sure you put the axle assembly together correctly? Did you forget to put the rubber damper for the cush drive back in? Missing any washers or spacers? Did the chain slack adjusters get rotated in the swingarm?There's a thought. Good brainstorming wrillo. Quote Link to comment Share on other sites More sharing options...
magley64 Posted August 19, 2009 Report Share Posted August 19, 2009 The only thing i can think of is swingarm slack (not THAT much though:wtf:)did you check the slack with the weight on the bike, or while on a center stand/similar? Quote Link to comment Share on other sites More sharing options...
Angrish Posted August 19, 2009 Report Share Posted August 19, 2009 put a screw driver in the chain between the chain and the rear sproket.....rotate so it "tightens" the chain when you rotate wheel so its on the rear sproket under the chain, that tightens the axel up against the adjusters, check alignment of adjusters and tighten axel nut ....all donr and even as long as the adjusters were even, or check to see if chain rides in center of links...as for the origoinal magical chain shrinking, time for a new chain either way, or you have a larger sproket on there....Shame on you. damnit. Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 19, 2009 Report Share Posted August 19, 2009 Does the sprocket look like this?Hopefully the swing arm doesn't look like this..'Now these guys have some problems!!! Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 19, 2009 Report Share Posted August 19, 2009 Some guy on Svr bought a bike and didn't notice the swing arm like that. Not very observant.The sprocket must have been someone who doesn't feel maintenance has any priority in riding a bike.I'm eager to see the issues with cclay's bike. 3-4 inches of slack is incomprehensible imo. After the pics above being discussed this week I'm prepared to see anything. Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 19, 2009 Report Share Posted August 19, 2009 The sprocket isn't the issue. Someone didn't install the rear axle spacer and the sprocket carrier walked and worked its way through the swing arm. At least that's what it looks like. I still won't take back the Gixxer comment.No need to take it back. I know what your talking about.Your right with axle spacer, I wonder if it was both the axle spacer and the spacer in the cush drive. It's hard to say. You can see a gap from the cush to the rim makes me curious. To not notice it was installed wrong and then to ride it for it to gouge the swinger like that is beyond me! Some people just need to leave their bikes alone. No matter how good their intentions are!I would have to say the sprocket is just a case of neglect. But I'm a little anal about how thing are maintained. Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 19, 2009 Report Share Posted August 19, 2009 Yeah' date=' I chalked the sprocket damage to a serious alignment issue, but who knows? I'm wondering how you don't feel the 'clunk, clunk, clunk' of the sprocket against the swing arm. I know this was over a very long time, but that had to be making a helluva racket. [/quote']Especially the instant force it had to take to initiate the trench. On an Sv650? For Pete's sake! Low end torque at it's best! Quote Link to comment Share on other sites More sharing options...
Whitey1 Posted August 19, 2009 Report Share Posted August 19, 2009 Especially the instant force it had to take to initiate the trench. On an Sv650? For Pete's sake! Low end torque at it's best!I am sure that occurred over a long period of time. If it was an instant hit you would have seen snapped bolts. Quote Link to comment Share on other sites More sharing options...
Likwid Posted August 19, 2009 Report Share Posted August 19, 2009 Yeah' date=' I chalked the sprocket damage to a serious alignment issue, but who knows? I'm wondering how you don't feel the 'clunk, clunk, clunk' of the sprocket against the swing arm. I know this was over a very long time, but that had to be making a helluva racket. [/quote']Oh no way, couple miles and it's worn all the way through... I wouldn't even notice... all sarcasm btw Quote Link to comment Share on other sites More sharing options...
Whitey1 Posted August 19, 2009 Report Share Posted August 19, 2009 Eh' date=' wouldn't take much effort. It had to be a gradual shift to the left and the sprocket carrier studs mimicked a CNC action. Just shaving barely enough to be unnoticeable for a long ass time.[/quote']yeah what he said.. heehe Quote Link to comment Share on other sites More sharing options...
420gsxr1000 Posted August 20, 2009 Report Share Posted August 20, 2009 ...got a swingarm????? lol Quote Link to comment Share on other sites More sharing options...
ReconRat Posted August 20, 2009 Report Share Posted August 20, 2009 That original thing about the chain changing tightness when the axle was torqued.I think I remember finding out that a thrust washer was missing.Either that, or I put one in there anyway.I guessed that without it was warping the swingarm when torquing. Yeah, had to over torque to keep the axle from moving forward.Worked better when it had all the parts it needed. Quote Link to comment Share on other sites More sharing options...
Wheezle Posted August 20, 2009 Report Share Posted August 20, 2009 That swingarm was cut but another tool that's not done by those nuts. Zoom in on th pic and look at the nuts there are no markings on them at all. Also look at the tool markings on each of the holes they are not made by those nuts. I'm thinking that this is a wheel swap that someone has done and didn't think much about what they were doing. This would explain the hubs for the sprocket and the wheel not matching up as well as the cuts in the swingarm. I for sure thought you Paul of all people would have examined these pics more closely. Being as you are a bike mechanic. Quote Link to comment Share on other sites More sharing options...
ReconRat Posted August 20, 2009 Report Share Posted August 20, 2009 (edited) Only one nut/stud would have hit and cut at a time. Not all would be the same height or width. One had to be taller/wider than the others, until it wore down. You can see one at the bottom of the pic that is completely worn away. Might even have sheared the nut/stud off.I wonder how long it took to do all that. All in one day? Edited August 20, 2009 by ReconRat Quote Link to comment Share on other sites More sharing options...
cclay Posted August 20, 2009 Author Report Share Posted August 20, 2009 problem resolved guys... appreciate all the good info. I def had it all put together right, the chain was just very worn. had a mech look at it and he couldnt find any probs. got a new chain and sprocket andeverything works fine. mech said the fact that i had the chain laying out in the sun for a few hours sunday might have made it expand more then what it was while on the bike. the heat factor with no tension restraint would easily expand an aged and unproperly cared for chain. im strapped, lubed and ready to bust again! Quote Link to comment Share on other sites More sharing options...
Lost1888 Posted August 20, 2009 Report Share Posted August 20, 2009 Wow... I'm not going to touch that with a ten foot pole. I'm just happy to hear your bike is good to go. Ride safe!!+1 I better keep my bike out of the sun. Quote Link to comment Share on other sites More sharing options...
Whitey1 Posted August 21, 2009 Report Share Posted August 21, 2009 Wow... I'm not going to touch that with a ten foot pole. I'm just happy to hear your bike is good to go. Ride safe!!Aww hell c'mon. If ya want I can have my 4 year old start it and you can tie up the loose ends for him. Quote Link to comment Share on other sites More sharing options...
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