I have a 2002 GSXR-750. I'm getting a slight pop noise when I take off sometimes not all the time my chain and sprockets have roughly 5700 miles on them my rear sprocket is aligned the chain and sprockets have been cleaned none of the teeth are messed up in anyway chain slack is at 25mm and I've set chain slack in other areas no difference with the pop noise. Its not consistent and I don't hear it at low speeds only when I take off from a stop ill get a slight pop. Also I've checked the chain every link looks and feels good. I have recently changed my front sprocket from a -1 back to stock the stock tooth size was on my bike roughly 500 miles and I switched it out for the -1 tooth roughly 5k miles I decided to change it back cause I didn't like it. Never noticed a pop or anything until then could it be the newer front sprocket causing this slight pop?? I've been trying everything I could think of. Help me please.... I've put a lot of money in this bike and I maintain it extremely well.
2002 GSXR-750 popping noise when taking off after front sprocket change?
Lawrence750
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It came with a rivet link and master link (bike master 520 1000cc rated) I chose to go with the rivet link installed with PBR chain tool exactly to spec. I think my washer is worn on my front sprocket I can move the sprocket a small amount with it tourqed to spec 83.2 ftlbs or 115NM maybe .1 - .2 mm with it in gear I can roll rear wheel each direction applying pressure once it stops and u can feel the sprocket move both directions as well as see the very slight movement im thinking that might be the noise hearing maybe the sprocket splines to the counter shaft splines play and when down shifting the sprocket is back more then when I take off it goes forward on take off causing a slight tap or pop or click however you want to describe it there's a noise and it doesn't happen all the time out of 34 take offs I hear it 1 time its when I down shift coming to a stop then take off is when I hear the noise I can take off hear it grab the clutch and brake and take off again not hear it then repeat this over and over never hear it go down the road down shift before a stop take off and hear it. I've read on some fourms people say add a little grrase to the splines to help with wear. It was a Honda fourm apparently its very common on Honda bikes i guess because I look it up and all I see is Honda.
I've read that people have put aftermarket sprockets on gsxrs and had this spline play issue and 1 guy said he asked his dealer to let him use a sprocket to check it and it was a sunstar sprocket and it fit very snug on the splines anyone else heard of this issue where some aftermarket sprockets are loose on the splines ?..
I’ve always used JT Sprockets any time I’ve had to change or replace, I've never in 20+ years had a single issue or complaint about them. I’ve always went steel as when it comes to drive line parts on street bikes aluminum just doesn’t have my confidence. JT is very much your run of the mill sprocket, nothing special and god dammit they work like a charm.
when it comes to splines on drive line parts be it the clutch or drive side, there should be ZERO play, ever. End of story. If there is get different parts.
when it comes to splines on drive line parts be it the clutch or drive side, there should be ZERO play, ever. End of story. If there is get different parts.
Thank you for the information and yeah I would never use aluminum sprockets buddy of mine had them on his bike when he bought it he launched it hard 1 time knocked 22 teeth off the rear sprocket.
Are you using 525 or 520 sprockets and chain?
What are the pros and cons of 520 vs 525 im just looking for strength and longevity. Also I've thought about the sunstar steel sprocket ls along with a EK525 MVXZ2 Quadra-X ring chain main reason that chain is tensile strength is good and it comes with rivet link as well as master link always good to have that master link laying around because you never know.
I plan on replacing the chain and sprockets ill probably order them tomorrow but I'm not sure what sprockets chain and 520 or 525 this is my first chain driven motorcycle and I just ordered whatever my buddy told me to order and I have 2 front sprockets with play in the splines by superlite they are steel.. so I want to try something different but not sure what to go with on the 2002 750..
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The 520 pitch change shouldn't be causing an issue if all your sprockets are 520 and your master link was for the installed chain. However, a NEW front sprocket could still be causing an issue if there is a slight amount of play on the shaft (this is true regardless of a replacement for stock 525 pitch or a switch to 520). You might find this a helpful watch:
the guy talks about sprocket play and shows a great example of a new sprocket not fitting as well as it should. Might help you at least rule this out anyway.
also I sent 2 emails to superlite sprockets and they never responded back which means there customer service isn't that great i sent one early this week as well as t
Thats a great video this is exactly what my bike is doing except you can't move the sprocket with it tourqed only when a decent amount of force is applied regardless this is exactly what is happening but i don't see wear on it but I will definitely check it again after watching this video as well as go with JT sprockets thank you very much.... but for strength and longevity which is better 520 or 525 or does it just not matter enough to argue which is overall better?
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The stock 525 pitch is heavier and will technically last longer but I run a 520 on my 750 for weight savings as it is rotating mass which is a great spot to shed weight. I've run 520 on every road bike and race bike I've ever owned without issue, if you take care of your chain (very regular clean & lube) then a 520 will last as long as a any 525 stock chain recommended replacement intervals. A maintained 520 will last 100 times longer then a poorly maintained 525. If you're really worried about longevity stick with steel sprockets, an aluminium rear sprocket will definitely wear faster then steel but a maintained chain won't be your issue.
I had that issue 1 time with this bike but I'm not having that issue anymore but I believe my washer has wore down some as well because of the movement of the sprocket so I'm going to replace it all nut washer chain and sprockets and hope for the best im thinking the sprockets i ordered just aren't the best of quality I guess.. superlite sprockets I know several people with these sprockets and ill be checking for play on them as well i do know my cousins sprocket nut came off on his zx10r about a week after sprocket change with superlite sprockets so maybe the sprockets are the issue as seen in the above video I honestly thought OEM would be best and I was about tonorder
Yes I've checked every single link on the chain I've checked and rechecked everything more than a few times. The above video in the comments is exactly what is happening. Think the slrockets i ordered just aren't the best of quality.
Thank you for all your help im going to take all of your advice and get the JT Sprockets and 520 chain most likely a EK chain as well as replace the washer and nut just to be safe and apply blue loctite again.
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19 Posts
Definitely rule out any issues with the current chain itself (such as tight / seized link) before blaming the sprocket. ....It may not be obvious there is an issue with the current chain while it is sitting on the bike and loosening all the tension and inspecting may help but a bad link issue may not be super obvious until it's removed. This may be the dirtbike rider in me talking, but you don't have to ignore chain maintenance very long to cause an issue regardless of the mileage on the chain.
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349 Posts
I doubt that this is your problem, but with all this talk of the "best" front sprockets to use, nobody has mentioned Suzuki OEM. Not only do they fit the splines perfectly, they also have rubber cush rollers for the chain to roll on. I've never seen an aftermarket sprocket have those.
Usually its cheaper to buy a transmission kit with a front sprocket in it, but I always throw that in the bin and put an OEM Suzuki front sprocket on.
I first did a back to back test of the two types of sprocket on an RGV 250 which was my first Suzuki which came with the rubber cushed sprocket as standard. The difference was immediately obvious, hence I always use them now.
Usually its cheaper to buy a transmission kit with a front sprocket in it, but I always throw that in the bin and put an OEM Suzuki front sprocket on.
I first did a back to back test of the two types of sprocket on an RGV 250 which was my first Suzuki which came with the rubber cushed sprocket as standard. The difference was immediately obvious, hence I always use them now.
I've taken pretty good care of the chain I clean it regularly I don't ride alot maybe 100 miles a week sometimes more sometimes less but I do a pre trip everytime I get on my bike if I start to see the shine go away on the chain ill clean it and lube it fairly often 3 times just since March 1st and I haven't really rode it that much maybe 200 miles in that time period 500 miles total since December when I changed my oil 316.4 miles since I replaced rotors brake pads and brake fluid. 60 miles since I replaced tires and balanced them. I keep track of anything and everything i do to the bike I enter the milage and date as well as whatever it is I do to it on my laptop. The above milage may be slightly off I don't have my laptop with me at the moment.
OK so the manufacturer finally messaged me back and said its normal nothing to worry about that there is slight variations in tolerances...... not so sure about this answer. I'm taking it as they don't care and eh its close enough of a fit sale it. So I will never buy superlite sprockets every again. Tried to tell me all sprockets have slight variations in tolerances..
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