43 tooth rear sprocket rocks
11-23-2008, 04:54 PM
#1
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Squid
Thread Starter
Join Date: Oct 2007
Location: San Diego
Posts: 97
43 tooth rear sprocket rocks
I just installed new sprockets and a new chain. I decided to go with a 43 tooth in the rear. Man, definitely worth it. It wheelies in first effortlessly. Second gear comes in with a vengeance. If you have a stock rear sprocket, I recommend the "upgrade". Oh, and I still cruise on the freeway at 80mph no problem.
Tapatio
Tapatio
11-23-2008, 05:03 PM
#2
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Squid
Join Date: Nov 2008
Location: minneapolis, mn
Posts: 9
I ran a stock front a 45 tooth rear....made first gear pretty much useless an second gear wheelies at 6000 ride em through 3rd an cruise at about 80-100 fun ****!! But as for the post i second the upgrade, you wont regret it!! 
-jon-
-jon-
11-23-2008, 05:38 PM
#3
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Superstock
Join Date: Nov 2008
Location: texas
Posts: 286
I just installed new sprockets and a new chain. I decided to go with a 43 tooth in the rear. Man, definitely worth it. It wheelies in first effortlessly. Second gear comes in with a vengeance. If you have a stock rear sprocket, I recommend the "upgrade". Oh, and I still cruise on the freeway at 80mph no problem.
Tapatio
Tapatio
iminterested in this sprocket change as i will need chain and sprockets soon. my question is at what rpm are you running at 70-75mph?
11-23-2008, 08:54 PM
#4
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SuperBike
Join Date: Jan 2007
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06-22-2013, 07:17 PM
#5
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Location: Ottawa Ontario
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is everything still linear? by changing the rear sprocket (using a gear calculator online) it shows that at 15mpg 41 =2395rpm, 43 = 2512rpm (difference of 117rpm) where as at 60mph 41= 9581 and 43 = 10049rpm (difference of 467 rpm) so the rpm does not climb linearly.. would that mean that the speedometer would also not climb linear.. or am I overthinking this and the differece is so minimal that I wouldn't really notice the non linearitly..
Why I ask is because I was thinking of using a gps and lable maker to correct the speedometer.. cheaper then a speed healer
Why I ask is because I was thinking of using a gps and lable maker to correct the speedometer.. cheaper then a speed healer
07-17-2013, 12:22 PM
#7
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MotoGP
Join Date: Nov 2006
Location: Skurup, Sweden
Posts: 6,109
is everything still linear? by changing the rear sprocket (using a gear calculator online) it shows that at 15mpg 41 =2395rpm, 43 = 2512rpm (difference of 117rpm) where as at 60mph 41= 9581 and 43 = 10049rpm (difference of 467 rpm) so the rpm does not climb linearly.. would that mean that the speedometer would also not climb linear.. or am I overthinking this and the differece is so minimal that I wouldn't really notice the non linearitly..
Why I ask is because I was thinking of using a gps and lable maker to correct the speedometer.. cheaper then a speed healer
Why I ask is because I was thinking of using a gps and lable maker to correct the speedometer.. cheaper then a speed healer
First, that's a very theoretical calculation you have there... The difference of a worn tire makes a noticable difference on the figures for instance... So, from new to worn, it affect's your speed vs your speedo enough to in theory get a ticket for it... Bone stock, nothing changed...
Second, the speedo isn't truly linear to begin with, and has a different error at differnt speeds, to never "decieve" you into breaking the law...
Third, the difference of 117 to 467 rpm is "huge" in terms of written numbers... But on a dial gauge at 60 mph it's a friggin small one, let me tell you...
But still, trying to use a label maker, you will most likely get a very peculiar looking speedo, with rather odd numbers, so I doubt it will be very user friendly, or intuitive to read... I'd say the $70 a SpeedoDRD costs is well worth it...
07-17-2013, 12:34 PM
#8
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Join Date: Jul 2005
Location: Santa Cruz, CA
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I've got to chime in here, I've had the 15 -43 going for 20,000miles, got really used to it. Just swapped everything back to OEM, and wow it's so much smoother and my gas mileage increased by 5 -10 miles to the tank. Just filled up with 117 on the trip meter.
BUT! I don't really care for it...Why, because I ride pretty aggressive and noticed that my style of riding uses the engine as a brake combined with lever. 15-43 runs the higher RPM throughout the gears obviously, thus more engine braking.
Relearning the OEM 16-41 gears: I'm finding myself nowadays entering corners a bit hot, on the brakes much harder, due to the RPM's being lower and me maintaining my usual aggressive riding pace. I'm switching back to a 43 rear when I have the money, but keeping the 16t front.soon.
It's a much tamer beast with OEM gearing.
BUT! I don't really care for it...Why, because I ride pretty aggressive and noticed that my style of riding uses the engine as a brake combined with lever. 15-43 runs the higher RPM throughout the gears obviously, thus more engine braking.
Relearning the OEM 16-41 gears: I'm finding myself nowadays entering corners a bit hot, on the brakes much harder, due to the RPM's being lower and me maintaining my usual aggressive riding pace. I'm switching back to a 43 rear when I have the money, but keeping the 16t front.soon.
It's a much tamer beast with OEM gearing.
07-17-2013, 02:33 PM
#10
Senior Member
SuperSport
Join Date: Apr 2013
Posts: 972
I've got to chime in here, I've had the 15 -43 going for 20,000miles, got really used to it. Just swapped everything back to OEM, and wow it's so much smoother and my gas mileage increased by 5 -10 miles to the tank. Just filled up with 117 on the trip meter.
BUT! I don't really care for it...Why, because I ride pretty aggressive and noticed that my style of riding uses the engine as a brake combined with lever. 15-43 runs the higher RPM throughout the gears obviously, thus more engine braking.
Relearning the OEM 16-41 gears: I'm finding myself nowadays entering corners a bit hot, on the brakes much harder, due to the RPM's being lower and me maintaining my usual aggressive riding pace. I'm switching back to a 43 rear when I have the money, but keeping the 16t front.soon.
It's a much tamer beast with OEM gearing.
BUT! I don't really care for it...Why, because I ride pretty aggressive and noticed that my style of riding uses the engine as a brake combined with lever. 15-43 runs the higher RPM throughout the gears obviously, thus more engine braking.
Relearning the OEM 16-41 gears: I'm finding myself nowadays entering corners a bit hot, on the brakes much harder, due to the RPM's being lower and me maintaining my usual aggressive riding pace. I'm switching back to a 43 rear when I have the money, but keeping the 16t front.soon.
It's a much tamer beast with OEM gearing.
07-17-2013, 07:32 PM
#13
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Join Date: Oct 2012
Location: Ottawa Ontario
Posts: 142
You are definetly over thinking it...
First, that's a very theoretical calculation you have there... The difference of a worn tire makes a noticable difference on the figures for instance... So, from new to worn, it affect's your speed vs your speedo enough to in theory get a ticket for it... Bone stock, nothing changed...
Second, the speedo isn't truly linear to begin with, and has a different error at differnt speeds, to never "decieve" you into breaking the law...
Third, the difference of 117 to 467 rpm is "huge" in terms of written numbers... But on a dial gauge at 60 mph it's a friggin small one, let me tell you...
But still, trying to use a label maker, you will most likely get a very peculiar looking speedo, with rather odd numbers, so I doubt it will be very user friendly, or intuitive to read... I'd say the $70 a SpeedoDRD costs is well worth it...
First, that's a very theoretical calculation you have there... The difference of a worn tire makes a noticable difference on the figures for instance... So, from new to worn, it affect's your speed vs your speedo enough to in theory get a ticket for it... Bone stock, nothing changed...
Second, the speedo isn't truly linear to begin with, and has a different error at differnt speeds, to never "decieve" you into breaking the law...
Third, the difference of 117 to 467 rpm is "huge" in terms of written numbers... But on a dial gauge at 60 mph it's a friggin small one, let me tell you...
But still, trying to use a label maker, you will most likely get a very peculiar looking speedo, with rather odd numbers, so I doubt it will be very user friendly, or intuitive to read... I'd say the $70 a SpeedoDRD costs is well worth it...
so on to my findings.. ya the front end tosses up pretty effortlessly in 1st. 6th gear is now the gear I ride in when cruising down the highway at 120 = 75miles.. over that the rpm does start to climb so if you cruise over 75 most of the time you may loose to fuel economy.. on the other side lower end is much improved! FUN factor increased! PS.. still can't wheelie in 2nd.. may just be me.
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