wynne67
Parking Attendant
Posts: 15
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posted May 29, 2011 12:50 PM
Std sprockets ZX12R, how many teeth?
Hi, i've just bought a zx12r B model, and when I set off in first gear it's like setting off in second gear as it kinda struggles and I have to slip the clutch which isnt good! I'm presuming oneof the previous owners has changed either one or both of the sprockets for longer gearing but I want to take it back to factory standard and wondered how many teeth there should be on both the front and rear sprockets. Thanks
  
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shiphteey
Needs a job
Posts: 2529
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posted May 29, 2011 01:46 PM
12 is geared tall. 18/46 stock. Go to the 17 tooth.
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Gemini Motorcycles
Topping out everything from Ninja 250s to nitrous ZX-14s.
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Paul2281
Expert Class
Posts: 147
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posted May 30, 2011 12:41 PM
You should ride mine...17/52...I can leave at idle and let the clutch out,lol....Kidding but it don`t take much....
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wynne67
Parking Attendant
Posts: 15
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posted May 30, 2011 01:16 PM
Thanks all, but I don't want a wheelie prone machine but whatever is on it now is just plain silly, it's like setting off in 2nd or third gear!
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wynne67
Parking Attendant
Posts: 15
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posted May 31, 2011 09:25 AM
Hi, Ive checked both sprockets and the front one is 18 and the back is 46 but I'm struggling with it as it is as I keep stalling it! Should I go to 17 on the front or 16? Would 17 make a big enough difference? I don't want a wheelie prone machine!'please
Advise. Thanks
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ZX12-5807
Expert Class
Posts: 137
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posted June 01, 2011 03:14 AM
Try the 17 toother up front first, if that isn't enough for ya then go up a little on the rear. I wouldn't go any smaller than the 17 on the front though. It might just take some seat time to get used to the 12. The first gear in the 12 is very tall compared to other bikes.
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2001 ZX12 1287cc
2001 ZX12 1317cc Lee's head
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wynne67
Parking Attendant
Posts: 15
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posted June 01, 2011 03:25 AM
Great, thanks all for your advice, I'm going to try a 17 tooth front sprocket to see how I get on.
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wynne67
Parking Attendant
Posts: 15
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posted June 04, 2011 07:42 AM
I've fitted a smaller 17 tooth front sprocket and I don't feel that it's made much difference. Could it be a fueling problem as it's got a scorpion can and k & n filter fitted? Please advise
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted June 04, 2011 10:48 AM
Probably cause of the heat...
I use to have a 16-44, much better...ohh and still use the OEM chain
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Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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