BarryG Posted February 6, 2007 Share Posted February 6, 2007 JT's 45 tooth is less $$. Anyone have one on the rear? Is AFAM worthe extra money? Thanks, B Quote Link to comment Share on other sites More sharing options...
xrdracer Posted February 8, 2007 Share Posted February 8, 2007 Renthal or AFAM in hard anodized aluminum. The quality is worth the few extra $$ Quote Link to comment Share on other sites More sharing options...
bartonmd Posted February 8, 2007 Share Posted February 8, 2007 I'd personally go Steel for sprockets... I've not tried the anodized aluminum sprockets, but I gather that, on the XX, they only last in the neighborhood of ~6,000 miles, and will prematurely fuck your chain up as they wear, since they wear faster than the chain... Mike Quote Link to comment Share on other sites More sharing options...
Rider99XX Posted February 8, 2007 Share Posted February 8, 2007 I have JT sprockets on my Bird and have had zero problems with them. Quote Link to comment Share on other sites More sharing options...
BarryG Posted February 9, 2007 Author Share Posted February 9, 2007 Thanks....I ended up getting a JT steel 45T rear....JT front as well. Neighbor works in parts a bike shop so only ran me $27. Quote Link to comment Share on other sites More sharing options...
dunedain Posted February 12, 2007 Share Posted February 12, 2007 afam steel Quote Link to comment Share on other sites More sharing options...
EVLXX Posted February 12, 2007 Share Posted February 12, 2007 Should have bought a steal 44t. Quote Link to comment Share on other sites More sharing options...
BarryG Posted February 12, 2007 Author Share Posted February 12, 2007 Should have bought a steal 44t. Why? I'm happy with the stock gearing. Quote Link to comment Share on other sites More sharing options...
EVLXX Posted February 12, 2007 Share Posted February 12, 2007 Why because, it would have also corrected your odometer error while not really affecting your gearing, or at least not enough to tell. No biggy.... Quote Link to comment Share on other sites More sharing options...
Iceman_40 Posted February 13, 2007 Share Posted February 13, 2007 Why because, it would have also corrected your odometer error while not really affecting your gearing, or at least not enough to tell. No biggy.... WHAT? You can't correct the error without changing the gearing....(unless you do it electronically) Besides -1T on the rear wouldn't help much at all maybe 1% Quote Link to comment Share on other sites More sharing options...
Venus97 Posted February 13, 2007 Share Posted February 13, 2007 Stock Sprockets are 17Front and 45 Rear. I understand changing to 18 front and 45 Rear will correct speedometer, but will make the lower gears a little longer. I'll let you what I think when I install in the next month or so. Quote Link to comment Share on other sites More sharing options...
EVLXX Posted February 14, 2007 Share Posted February 14, 2007 Why because, it would have also corrected your odometer error while not really affecting your gearing, or at least not enough to tell. No biggy.... WHAT? You can't correct the error without changing the gearing....(unless you do it electronically) Besides -1T on the rear wouldn't help much at all maybe 1% First off, It's an easy assumption to think that because the Speedometer and Odometer are connected in the same device that they will be out of calibration by the same amount, but in reality they are 2 seperate mechanisms mounted togeter and working in relation to each other by internal gearing. After a hole gob of testing, with another personnal friend of mine, and through various methods like GPS, Wheel Measured, triangulation, Timing, calibratable speedometers and odometers, and various Other poeple here on the site. I was able to come to the conclusion that my 99 XX with a Half worn Rear tire, had a speedometer error of about 6.0 - 6.2%. Additionally I also was able to arrive at the conclusion that the Odometer had an error of about 2.6 - 2.7%. The stock gearing is a Rear/ Front combo of 45/17, which if divided out gives you a number value of 2.6471. If you change the Rear sprocket to a 44 giving you a 44/17 combo, the value changes to 2.5882, for a difference of 2.28%. Hence the 44/17 combo will corret you Ometer within 0.3 - 0.4%. Additionally it will bring you Speedometer error down to around a flat 4%. Now if you change the combo to a 45/18, that value changes to 2.5, for a difference of 5.88%. Hence the 18/45 combo will bring your Speedometer to within approximately 0.1 - 0.3%, and over correct your Odometer by about 3.1%. At which point you will not be reading as many miles as actually traversed. So all you need remember is.. ... stock gearing of 45R/17F... + 6.2% spedometer reading error and +2.6% Odometer reading error. ...........................44R/17F... + 4 % speedometer reading error and + 0.4% Odemeter reading error. ...........................45R/18F... + 0.3% speedometer reading error and - 3.1% Odometer reading error. I also find it ammusing how those numbers all coinside...... strange, but cool at the same time. And if you don't believe me, you can either start testing for yourself or.... ask my Wife, my Dad, or My close Friend... they all thought I was crazy while I was conducting all these various tests... "FOR WHAT!"... they would say. To which I would answer... "Because I want to!" Quote Link to comment Share on other sites More sharing options...
BarryG Posted February 14, 2007 Author Share Posted February 14, 2007 Well I got the new ZVM and F/R sprockets installed. Bike runs noticeably smoother although do a hear a little more whine now...but been reading that's to be expected with the JT steel sprockets. Anyway the XX goes like a raped ape as expected and feels much better now. Quote Link to comment Share on other sites More sharing options...
EVLXX Posted February 15, 2007 Share Posted February 15, 2007 Sweet! Wish I could go riding! Enjoy some for me please. Quote Link to comment Share on other sites More sharing options...
BarryG Posted February 16, 2007 Author Share Posted February 16, 2007 Sweet! Wish I could go riding! Enjoy some for me please. I'll take care of that for you. Supposed to hit 80 here tomorrow......which is warm even for here this time of the year. Quote Link to comment Share on other sites More sharing options...
Para045 Posted February 21, 2007 Share Posted February 21, 2007 Why because, it would have also corrected your odometer error while not really affecting your gearing, or at least not enough to tell. No biggy.... WHAT? You can't correct the error without changing the gearing....(unless you do it electronically) Besides -1T on the rear wouldn't help much at all maybe 1% First off, It's an easy assumption to think that because the Speedometer and Odometer are connected in the same device that they will be out of calibration by the same amount, but in reality they are 2 seperate mechanisms mounted togeter and working in relation to each other by internal gearing. After a hole gob of testing, with another personnal friend of mine, and through various methods like GPS, Wheel Measured, triangulation, Timing, calibratable speedometers and odometers, and various Other poeple here on the site. I was able to come to the conclusion that my 99 XX with a Half worn Rear tire, had a speedometer error of about 6.0 - 6.2%. Additionally I also was able to arrive at the conclusion that the Odometer had an error of about 2.6 - 2.7%. The stock gearing is a Rear/ Front combo of 45/17, which if divided out gives you a number value of 2.6471. If you change the Rear sprocket to a 44 giving you a 44/17 combo, the value changes to 2.5882, for a difference of 2.28%. Hence the 44/17 combo will corret you Ometer within 0.3 - 0.4%. Additionally it will bring you Speedometer error down to around a flat 4%. Now if you change the combo to a 45/18, that value changes to 2.5, for a difference of 5.88%. Hence the 18/45 combo will bring your Speedometer to within approximately 0.1 - 0.3%, and over correct your Odometer by about 3.1%. At which point you will not be reading as many miles as actually traversed. So all you need remember is.. ... stock gearing of 45R/17F... + 6.2% spedometer reading error and +2.6% Odometer reading error. ...........................44R/17F... + 4 % speedometer reading error and + 0.4% Odemeter reading error. ...........................45R/18F... + 0.3% speedometer reading error and - 3.1% Odometer reading error. I also find it ammusing how those numbers all coinside...... strange, but cool at the same time. And if you don't believe me, you can either start testing for yourself or.... ask my Wife, my Dad, or My close Friend... they all thought I was crazy while I was conducting all these various tests... "FOR WHAT!"... they would say. To which I would answer... "Because I want to!" Yeah this has been discussed quite a bit on the BIRD site as in the UK and here in Aus the stock gearing is I believe 17/44 :icon_think: Quote Link to comment Share on other sites More sharing options...
pcinpdx Posted September 26, 2007 Share Posted September 26, 2007 I was thinking about going the 45R/18F route and called a local shop just cruzing for prices. They told me I would also have to replace my chain at the same time. Does that jive? Quote Link to comment Share on other sites More sharing options...
SLyFoXX Posted September 26, 2007 Share Posted September 26, 2007 I was thinking about going the 45R/18F route and called a local shop just cruzing for prices. They told me I would also have to replace my chain at the same time. Does that jive? What local shop did you talk to? Some will and some won't...... Quote Link to comment Share on other sites More sharing options...
pcinpdx Posted September 27, 2007 Share Posted September 27, 2007 What local shop did you talk to? Some will and some won't...... I just called Pro Caliber over in Vancouver for a quick and dirty price check. I wouldn't buy from them but wanted to get an idea of local vs. WBR or another online shop. If you have any suggestions for local shops, please pass them on. Thanks - PC Quote Link to comment Share on other sites More sharing options...
SLyFoXX Posted September 27, 2007 Share Posted September 27, 2007 What local shop did you talk to? Some will and some won't...... I just called Pro Caliber over in Vancouver for a quick and dirty price check. I wouldn't buy from them but wanted to get an idea of local vs. WBR or another online shop. If you have any suggestions for local shops, please pass them on. Thanks - PC EDR Perfomance 1319 NW Johnson St Portland, OR 97209 | 503.222.RACE (503.222.7223) fax 503.224.2315 Tuesday - Friday 9:30am - 6:30pm | Saturday 9:00am - 5:00pm link Quote Link to comment Share on other sites More sharing options...
OZDave Posted September 27, 2007 Share Posted September 27, 2007 Well I got the new ZVM and F/R sprockets installed. Bike runs noticeably smoother although do a hear a little more whine now...but been reading that's to be expected with the JT steel sprockets. Anyway the XX goes like a raped ape as expected and feels much better now. How many miles did you have on the bike when you changed them? Quote Link to comment Share on other sites More sharing options...
cbracerx Posted September 27, 2007 Share Posted September 27, 2007 What about the effect of changing only the rear sprocket to 43T and keeping the stock front? I just did this without much thought since a new sprocket came with some (new to me) wheels. Quote Link to comment Share on other sites More sharing options...
tomek Posted September 27, 2007 Share Posted September 27, 2007 Durability of JT steel sprockets is nowhere near O.E.M. or even Sunstar.My front JT looked like crap after about 23k miles on ZWM2 chain,,replaced with some used-brand-new-looking Sunstar.Chain was replaced at 30 k miles. Same deal with rear,,,,,while O.E.M looked brand new after 2 chain lives,there is noticable wear on my rear JT barely after one chain. Don`t even bother with aluminium sprockets if durability is your goal,hard anodizing,titan tough,etc,does not matter,they don`t last. Quote Link to comment Share on other sites More sharing options...
Northman Posted September 27, 2007 Share Posted September 27, 2007 Durability of JT steel sprockets is nowhere near O.E.M. or even Sunstar.My front JT looked like crap after about 23k miles on ZWM2 chain,,replaced with some used-brand-new-looking Sunstar.Chain was replaced at 30 k miles. I've run a JT sprocket on my big bore for over 20K on the same chain, with very little noticeable wear. The stocker after 30K was badly worn in comparison, with a stock engine. I would not hesitate to use another JT sprocket, and have installed a few for friends with great results. Quote Link to comment Share on other sites More sharing options...
BarryG Posted September 28, 2007 Author Share Posted September 28, 2007 Well I got the new ZVM and F/R sprockets installed. Bike runs noticeably smoother although do a hear a little more whine now...but been reading that's to be expected with the JT steel sprockets. Anyway the XX goes like a raped ape as expected and feels much better now. How many miles did you have on the bike when you changed them? A little over 20K on orig chain, sprockets when I changed them. Quote Link to comment Share on other sites More sharing options...
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