Sprockets!

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Sprockets! - 8/20/2005 1:40:29 AM    brancart1 Posts: 589 Joined: 5/1/2005 From: Chicago, IL Status: offline I have heard very differernt things when it comes down to the set-up of the sprockets and the result of doing so. So i figured i would try and put an end to all of it. Ive been reading that alot of people decide on buying the -1 tooth front sprocket and then just leave it at that. Well with the -1 tooth front sprocket you get more acceleration but less top end, right? well the mechanic at the local shop doesnt seem to think so, he told a buddy of mine that by adding 2 teeth to the front sprocket would increase acceleration, but decrease top speed. Could the mechanic be wrong? it just seems like common sense that the smaller the front sprocket the better acceleration you would get because it puts less stress on the motor. So i guess the problem i have is that there are 2 different opinions on how sprockets work in relation to their size. I wish there was like a chart that actually showed different levels of performance based upon what sprocket set-up you have. Ive always thought of buying the -1 tooth on the front sprocket just to get more acceleration, but also to still keep the bike relatively close to its stock powerband. Ive just been hearing two different sides of this, and if anybody has any clue on how this sprocket thing works, let me know. Thanks Post #: 1

RE: Sprockets! - 8/20/2005 8:34:48 PM    KeredstgCBR Posts: 6 Joined: 8/9/2005 Status: offline well you are in luck I am that chart...as well as many others around here. First of it's all about ratios but you already know that. The lower the nuber of teeth for the front and the higher number of teeth for the rear equals faster acceleration and lower top end. However on some bikes mainly older ones areodynamics played a large roll in top speed where the engine acctually didn't have enmough power to get to top speed. So It is possible to drop one tooth on the front or raise one or two in the rear and acctually get the bike to reach a higher top speed. Things to remember: smaller front sprocket = more acceleration bigger rear = more acceleration a close rule of thumb is down one in front is near the same affect of up in rear If at all possible get ahold of a gearing calculator(usually an excel spreadsheet) It will speel out of of this for you and you can see how diff sprockets change the output Hope this helped! _____________________________ 2002 CBR954RR - Silver/Black - Carbon fiber: Micron slipon, mirrors, sliders, spools, tankpad - custom seat skin - red reflective rim stripes - cut tail (in reply to brancart1) Post #: 2

RE: Sprockets! - 11/11/2005 3:59:25 PM    fastmofo   Posts: 95 Joined: 10/31/2005 Status: offline Im in the process of trying -1 in the front and up 3 in the back.ill letcha know how everything turns out. (in reply to KeredstgCBR) Post #: 3

RE: Sprockets! - 11/22/2005 2:55:16 PM    Stonecold34gixxer   Posts: 32 Joined: 11/2/2005 Status: offline DO NOT! Repeat. DO NOT, take your bike to that "mechanic?". _____________________________ APE Phone Sales Guru (818) 842-4952 Track Day Instructor http://www.cbrzone.com (in reply to brancart1) Post #: 4

RE: Sprockets! - 11/22/2005 3:14:04 PM    Stonecold34gixxer   Posts: 32 Joined: 11/2/2005 Status: offline By the way, I forgot to mention that going down 1 tooth in the front is roughly equivalent to going up 2.4 - 2.7 teeth in the rear. In other words, 1 down in the front and 2 up in the rear equals a final drive change of about 4.4 - 4.7 teeth. _____________________________ APE Phone Sales Guru (818) 842-4952 Track Day Instructor http://www.cbrzone.com (in reply to brancart1) Post #: 5

RE: Sprockets! - 11/22/2005 3:18:47 PM    cjbettis Posts: 1098 Joined: 10/29/2005 Status: offline Just read a good articel: http://www.sportrider.com/tech/146_0008_gearing/ Tells you exactly what - or + does both to the front and the rear...mathematically, to speed, and visually...hope it helps _____________________________ (in reply to Stonecold34gixxer) Post #: 6

RE: Sprockets! - 12/2/2005 6:25:24 PM    FordFrenzy97   Posts: 632 Joined: 10/30/2005 From: Spring Hill, Florida Status: offline Maybe the mechanic thought you said -1 in the back (in reply to cjbettis) Post #: 7

RE: Sprockets! - 12/5/2005 6:20:30 PM    Ride till I Die   Posts: 110 Joined: 12/1/2005 Status: offline lets hope he thought that you meant back or I wouldnt let him have anything to do with my bike. _____________________________ 96 Honda cbr 600 f3 K & N air filter Jardine Rt One slip on (in reply to FordFrenzy97) Post #: 8

RE: Sprockets! - 1/2/2006 4:57:05 PM    fastmofo   Posts: 95 Joined: 10/31/2005 Status: offline man took the bike out for a quick spin around the block today and what a diffrence in acceleration going up 3 in the back and -1 in the front.The rpms remain a bit higher all the time so Im sure my mpg will also go down.I got all the low end torque that the 600 lacks with the stock set up.Well worth the 160 bucks for the DID 520 conversion. (in reply to Ride till I Die) Post #: 9

RE: Sprockets! - 1/3/2006 7:15:01 PM    Tahoe SC Posts: 5798 Joined: 8/24/2005 Status: offline dope price mang! where you go for 160 and what kit? (in reply to fastmofo) Post #: 10

RE: Sprockets! - 1/3/2006 10:44:46 PM    sirlimpzalot Posts: 1404 Joined: 8/24/2004 From: Roseville, CA Status: offline Don't forget that the Speedo is driving off the gearing on most newer bikes..so your speed is going to be off alot with that type of gearing...lets say that you are reading 70, but your actual ground speed is 55, drive for 2 hours and your bike thinks you went 140 miles, but reality is only 110 miles were covered, and that error is only after 2 hours of driving.!!!! Contact Cal-Sportbike ( sponsor here) they sell the speedo-healer which will help recalibrate your speedometer _____________________________ That sure was a FAST BIG GREEN TRUCK!! (in reply to Tahoe SC) Post #: 11

RE: Sprockets! - 1/10/2006 2:24:20 AM    jordan Posts: 32 Joined: 1/4/2006 Status: offline ive got two up out back on my recently purchased 99 f4, and I am having trouble keeping the front wheel on the ground through third gear... but i only weigh about a buck sixty... too much fun... im just getting used to my new ride, and the two up make a huge diff imo...ive ridden other cbr's...even a 929 that didnt lift like my lil 6 does. (in reply to sirlimpzalot) Post #: 12

RE: Sprockets! - 5/4/2006 3:43:37 PM    erion929   Posts: 10 Joined: 5/4/2006 Status: offline i am in the original posters boat i dunno if i want 1 down in front or 2 up in back _____________________________ ERION929 (in reply to jordan) Post #: 13

RE: Sprockets! - 5/4/2006 5:31:23 PM    Tahoe SC Posts: 5798 Joined: 8/24/2005 Status: offline -1 front is equal to about +3 in the back...go with the bigger rear as it'll help the chain wear better...or less chain wear i mean. (in reply to erion929) Post #: 14

RE: Sprockets! - 5/4/2006 10:04:01 PM    Polaris446   Posts: 4 Joined: 5/4/2006 Status: offline i have a 04 600 rr i need to get a better second gear wheelie with a little more ease from the bike it seems like im killing my self trying to get it up.. (in reply to brancart1) Post #: 15

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