"POP" sound when taking off - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 30 (permalink) Old 09-18-2007, 10:37 AM Thread Starter
 
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"POP" sound when taking off

I have a 04' GSXR750. 2500miles. Sometimes when I let out the clutch to take off there is a single pop or clunk sound down be the front sprocket. I also hear a click sound when I pull in the clutch as Im coming to a stop. I have adjusted the chain to 30mm and lubed it. I have heard of other GSXR's having this problem but nobody knows what the sound is or why it makes it.????
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post #2 of 30 (permalink) Old 09-18-2007, 10:47 AM
 
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Have you checked or had some one check to see if youtr chain needs to be to be adjusted?
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post #3 of 30 (permalink) Old 09-18-2007, 10:52 AM
 
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And you should lube your chain every 500miles or so also, just FYI.
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post #4 of 30 (permalink) Old 09-18-2007, 11:00 AM
 
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if it was a honda id say it was the v-tec pop you hear but its a gsxr so idk

do you actually hear the click on the clutch, or do you feel it? i know that sounds retarded, but a few years ago riding a 02 600, whenever i pulled the clutch in i could feel sorta like a click in my hand. never found anything wrong with the bike, just ended up assuming it was the clutch switch makin contact or something. maybe you just need to lube the cable.
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post #5 of 30 (permalink) Old 09-18-2007, 11:05 AM
 
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Sometimes if you are at high rpm's and try to down shift to first you might hear it clunk or pop. And i totally didn't see that ya adjusted and lubed chain sorry.
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post #6 of 30 (permalink) Old 09-18-2007, 11:05 AM
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Have you checked your sprocket for broken or worn teeth? Sounds to me like you need a new front sprocket.
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post #7 of 30 (permalink) Old 09-18-2007, 11:07 AM
 
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I know on my old 78 yamaha xs11 i had to adjust my clutch cable every 2500 miles.
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post #8 of 30 (permalink) Old 09-18-2007, 12:02 PM Thread Starter
 
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I adjusted the clutch also. I can kinda feel the click when I pull in the clutch when I am coming to a stop. If the bike is in neutral I can pull the clutch in a 100 times and not hear the click. It's almost like the slack of the chain is being taken up on the front sprocket. As far as the clunk I feel when taking off. It comes and goes. While adjusting my chain I did notice There were a couple of spots where the chain measured 30mm and the rest 35mm. It's not slapping the swingarm either. It's driving me crazy!!
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post #9 of 30 (permalink) Old 09-18-2007, 12:05 PM
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I adjusted the clutch also. I can kinda feel the click when I pull in the clutch when I am coming to a stop. If the bike is in neutral I can pull the clutch in a 100 times and not hear the click. It's almost like the slack of the chain is being taken up on the front sprocket. As far as the clunk I feel when taking off. It comes and goes. While adjusting my chain I did notice There were a couple of spots where the chain measured 30mm and the rest 35mm. It's not slapping the swingarm either. It's driving me crazy!!
Broken sproket tooth.
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post #10 of 30 (permalink) Old 09-18-2007, 12:23 PM Thread Starter
 
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What would cause a broken sprocket tooth? I bought the bike off a guy with 2200 miles. So i don't know how he rode it. If I pull the sprocket cover off I should be able to see it if its broke correct?
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post #11 of 30 (permalink) Old 09-18-2007, 12:32 PM
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What would cause a broken sprocket tooth? I bought the bike off a guy with 2200 miles. So i don't know how he rode it. If I pull the sprocket cover off I should be able to see it if its broke correct?
Stunting. Trying to contantly do wheelies will break a sproket. Yes, you will need to spin the sproket so you can see all the teeth. Put the rear on an stand and with the bike in neutral spin the rear wheel while inspecting the front sproket. The sproket may not be broken but it might be worn down too much.
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post #12 of 30 (permalink) Old 09-18-2007, 12:36 PM Thread Starter
 
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This weekend I will tear her down and take a look.
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post #13 of 30 (permalink) Old 09-18-2007, 12:40 PM Thread Starter
 
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Hey one more quick question. Will riding her do any damage until then? I have been riding quite a bit.
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post #14 of 30 (permalink) Old 09-18-2007, 12:44 PM
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Hey one more quick question. Will riding her do any damage until then? I have been riding quite a bit.
Further damage to your sproket and possibly the chain. If you need a new front sproket, I suggest changing the rear sproket and chain all together anyway.
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post #15 of 30 (permalink) Old 09-18-2007, 01:00 PM Thread Starter
 
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As long as it does'nt affect anything else like output shaft. I will just replace chain and sprockets maybe gear down a little. If I gear down won't that affect my speedo and odometer?
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post #16 of 30 (permalink) Old 09-18-2007, 01:02 PM
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As long as it does'nt affect anything else like output shaft. I will just replace chain and sprockets maybe gear down a little. If I gear down won't that affect my speedo and odometer?
Just dont hammer on it too hard until you get it fixed.

Yes it will affect your speedo and odometer.
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post #17 of 30 (permalink) Old 09-18-2007, 01:12 PM Thread Starter
 
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Is that legal if your odometer is wrong because of it?
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post #18 of 30 (permalink) Old 09-18-2007, 01:17 PM
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Is that legal if your odometer is wrong because of it?
The speedo will read fast, so the worst case scenario is that if you are riding at the speed limit on your speedo, you might bet a ticket for going too slow.
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post #19 of 30 (permalink) Old 09-18-2007, 01:19 PM Thread Starter
 
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Sometimes I think I need that! LOL Would'nt your bike show more miles than it actually has then?? resale
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post #20 of 30 (permalink) Old 09-18-2007, 01:23 PM
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Have you checked your sprocket for broken or worn teeth? Sounds to me like you need a new front sprocket.
I highly doubt you'd f up the front sprocket before you did the rear all to hell. The front is hardend steel where as the rears are alum alot of the time.

Some clicking is normal for many clutches even though its less likely on a wet clutch.

When is the last time you changed the oil?

I'm betting though, that it is actually your chain. You will need to replace the chain and both sprockets. Now is a good time for some gearing change.




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