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Old 10-15-2007, 06:27 PM   #1
doc_zx10r
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Installed new rear sprocket

Hey all I just installed a new Vortex rear sprocket on my ZX10R. I went up a few teeth in the rear, just to see what kind of performance I can get. This morning on my way to work, I noticed that when I accelerate that my bike jumps and skips in the rear. And I'm not even hitting the gas hard. I'm running Diablo Corsa III and I have plenty of meat on them. Could this be a tire problem or should I look into replacing the chain and front sprocket? I know its not my transmission or my clutch, anyone have any ideas?

Sondy
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Old 10-15-2007, 06:36 PM   #2
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go back to stock teeth.
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Old 10-15-2007, 06:58 PM   #3
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How is the chain or the teeth worn? is it the tire spinning? need more info, like lugging bike with increased rear sprocket?
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Old 10-15-2007, 07:19 PM   #4
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i used to have that problem when i was down one up 10
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Old 10-15-2007, 07:31 PM   #5
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Quote:
Originally Posted by no mercy f4i View Post
i used to have that problem when i was down one up 10
up ten? stunting?
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Old 10-15-2007, 07:47 PM   #6
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probably...haha!
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Old 10-15-2007, 07:50 PM   #7
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Quote:
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up ten? stunting?
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Old 10-15-2007, 07:53 PM   #8
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not much of a stunter.... u would like to see that on a busa, wouldn't u, u sick people...

Is that the large a$$ sprocket I see on the stunters at our M&Gs?
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Old 10-15-2007, 07:54 PM   #9
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not much of a stunter.... u would like to see that on a busa, wouldn't u, u sick people...

Is that the large a$$ sprocket I see on the stunters at our M&Gs?
yessir
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Old 10-15-2007, 09:39 PM   #10
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Well it only happens when I give it some gas. My guess is its the tire, the chain seems fine. However I am going to change out the chain just to make sure. I'm guessing that I should go back to stock gearing.
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Old 10-15-2007, 10:24 PM   #11
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Diagnosis; what ever you or the enviroment changed between now and the last ride you took should probably be inspected. The tire skipping may not be the problem but the cause of a larger rear sprocket, more torque to the ground.

Ur prob on track, go back to what you had before this problem began. Tires don't usually skip(take that back, I was spinning up to 60 when I rolled cold after I was wrecked saturday morning, whataburger parking lot show off to some kids.... was worth it )
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Old 10-15-2007, 10:57 PM   #12
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does your rear sprocket match your front sprocket? (example....520 sprocket front and rear, make sure they are not mismatched like a 525 front sprocket, and 520 rear sprocket)

also is your chain length long enough to fit the new rear sprocket? check the teeth on the sprocket to see if they're all there. is the chain too loose?

i highly doubt it's your tires/transmission/clutch, it's a gearing/chain problem.
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Old 10-16-2007, 07:11 PM   #13
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Well I went back to my stock gear and things seems to be fine. Now I'm going to need to find a standard sprocket/chain. Get this an 2006 ZX10R uses a 525 chain setup. I thought for sure they would use a 530, the sprocket that I did buy was a 525. I guess TOO much torque to the ground? Any thoughts folks?

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Old 10-16-2007, 07:18 PM   #14
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so you have a 525 and 530 setup? i'm a bit confused.....if you do, that's probably why it's not working correctly. if you have a 525 chain....you gotta go with 525 sprockets.

and i'm pretty sure it's not because too much torque to the ground. you might've had the chain on too tight as well. if you're chain is on too tight, it will restrict the swingarm and rear suspension from traveling, and might cause that hop
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Old 10-16-2007, 08:27 PM   #15
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No, I have a 525 setup, the sprocket I bought was a 525 too. BUT I counted the teeth on it and I counted 41. Now the NICE young idiot that sold it to me at Cycle Gear, told me that it was a 40. Now going +3 in the rear is a lot more than +2. I should just go -1 in the front and be done with it. But even if one went +3 in the rear, it shouldn't skip like it was right? This whole thing is driving me crazy.

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Old 10-16-2007, 09:24 PM   #16
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Quote:
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No, I have a 525 setup, the sprocket I bought was a 525 too. BUT I counted the teeth on it and I counted 41. Now the NICE young idiot that sold it to me at Cycle Gear, told me that it was a 40. Now going +3 in the rear is a lot more than +2. I should just go -1 in the front and be done with it. But even if one went +3 in the rear, it shouldn't skip like it was right? This whole thing is driving me crazy.

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going down one in the front is the same as +3 in the rear
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Old 10-16-2007, 10:01 PM   #17
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lol! it's definitely not too much torque getting to the ground. the zx-10 will loop itself before it spins the rear tire, especially with a corsa 3 on the rear. i'm running -1fr,+1rr(+3rr and +2rr as well) and don't have any of the problems you described, UNLESS i'm not paying attention and i overtighten the chain. the 10 calls for 1.4-1.8" of freeplay in the chain, anything less than that and when the suspension compresses it will severely overtighten the chain and cause it to bind against the sprockets.

if you tried to use your stock chain with the +3 rear, overtightening is for sure your problem. to go +3 on the rear with a stock front, you have to get a new chain with 2-3 more links, depending on how long you want your wheelbase to be. go with a 16t front and you'll love it.
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Old 10-16-2007, 10:02 PM   #18
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ok, wait a second....i just noticed you said you got a 41t rear...that's only a +1 for the 2nd gen 10. stock is a 40t.
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Old 10-17-2007, 02:34 AM   #19
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Well the book said stock was 38. Now get this the same problem I depicted before, happens in 4th gear rather than 3rd with the standard sprocket. Now I know we've all hit false neutrals before. I've noticed that it's only happens when I hit about 6k rpms that bike wants to jump forward as if I hit a false neutral and then it runs fine. Now As of Saturday I had eximports change my oil, only because I have a prepaid deal with a sister dealer WOODSFUN Center. They where kind enough to put on the new sprocket but, I didn't have any problems with it the whole day. And believe me I hit the gas just to play around. I don't stunt the bike, other than the occasional wheelie here and there. Could I have a clutch or tranny problem? I've never experienced anything like this at all.

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Old 10-17-2007, 08:37 AM   #20
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shouldnt of gone to eximports IMO
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