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Discussion Starter · #1 ·
Just thought I would start a thread about sprockets. I know some of you are new to riding and need to get down the basics first. Then you want ot start with making the bike your own, like we all have a tendency to do.:D First things first, I can assu

Just thought I would start a thread about sprockets. I know some of you are new to riding and need to get down the basics first. Then you want ot start with making the bike your own, like we all have a tendency to do.:D First things first, I can assure you one of the best bangs for your buck is sprockets. I have always done two things when I first get a bike. The first is take it to a bike shop in houston which sets up my suspension (look into it, it will improve your riding and confidence in the bike). The next is on a typical sport bike I would do a -1/+2 sprocket set up. That means you go one tooth down on the front sprocket and 2 teeth up on the rear. This translates into an increase in acceleration on the bike. It is a very noticable increase and will only set you back about $75 dollars if you go with a good company like VORTEX. Now when you do this conversion remember your RPMs will be higher while cruising so it takes away form your top end. Something like that on a big CC bike is not a big deal because they can travel 170MPH. On our bikes you may not want to sacrifice top end. But with this bike I am actually going to by 2 sprocket set ups. The first will be the traditional -1/+2 and the next will be a reverse +1/-3. That will give about 5 to 8 MPH faster top end or more depending on conditions (I have to guess at this point, dont have them yet). This will also increase the already outstanding fuel milage form the bike as that will make the cruising RPMs lower at higher speeds. Enough with the long post, I hope I have helped you guys out. I have been around bikes my whole life and have some good info....sometimes.....hope to get more definite numbers soon as I will be ordering the sprockets in a few weeks. I called VORTEX and they can custom make them for us. It doesnt cost any extra. I also had a few years where I stunted and have gotten 75 tooth rear sprockets before......those are only good for slow wheelies, I wouldnt recomend that for a daily riding bike. But anyway, keep in mind that power comanders and exhaust do add to performance but sprockets can give you great value for your dollar and they are easy to install. The standard conversion I talked about does not require you to buy a new chain, the stock will work. I have done it to all of my sport bikes. Stay Safe everyone!!:cool:
 
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Discussion Starter · #2 ·
I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front and modifying the

I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front and modifying the rear as well they never had anything good to say other than they had zero power. Most stop at a +1 front on these bikes, or should i say at least on the 250. I got my +1 sprocket for $10 shipped on Ebay, can't beat it lol
 
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Discussion Starter · #3 ·
[QUOTE="cbzdel, post: 824"]I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front

I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front and modifying the rear as well they never had anything good to say other than they had zero power. Most stop at a +1 front on these bikes, or should i say at least on the 250. I got my +1 sprocket for $10 shipped on Ebay, can't beat it lol
Definately an awesome deal. If you get it installed let me know if it fit. The guy at the dealership couldnt say if they would change out since he didnt have any sprockets in stock to check. If i custom order the one from vortex it is only $20 shipped but if the 250 ones work then I know i can get them cheaper. As for the power these bikes already have a little less than im used to but when I use it to commute I would like to see if i could get outrageous gas milage. Plus on my commute I dont "have" to go faster than 50mph. I wonder if i could get a whole months worth of driving to and from work on one tank....hmmm....ill definately try since the commute is only a few miles a day one way. Might be hard to do with all the riding in between.
 
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Discussion Starter · #4 ·
great advice. good to have you on here jdizzle. looking forward to your share of knowledge.

great advice. good to have you on here jdizzle. looking forward to your share of knowledge.
 
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Discussion Starter · #5 ·
I will try to take a look at the sprockets this weekend.. It looks like rain so I wont be riding.. I think the one I have is a JT Sprocket

I will try to take a look at the sprockets this weekend.. It looks like rain so I wont be riding.. I think the one I have is a JT Sprocket
 
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Discussion Starter · #6 ·
[QUOTE="cbzdel, post: 824"]I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front

I have a +1 front sitting in my tool box that i bought new for the 250r and never installed it because i didn't have the right size socket i should try to install it onto the 125.. When i read reviews about people doing the +1 front and modifying the rear as well they never had anything good to say other than they had zero power. Most stop at a +1 front on these bikes, or should i say at least on the 250. I got my +1 sprocket for $10 shipped on Ebay, can't beat it lol
I did +1 front and I forget what on the rear of my 250 and it reduced engine speed by 1k rpm @ highway speeds. It made 1st gear more useable. It only reduced acceleration a little because lets face it, with the 250 you have to rev really high to accelerate fast anyway. Basically I just have to rev higher before upshifting and it works just as well as stock. I am happy I made the switch as I could not stand constantly doing 10k rpm @ 80mph, whereas I am OK with 9k rpm.

As far as what to do with the 125, it already comes with taller gears than the 250 so I will simply wait and ride it first for a while and see what it is like. I doubt I would go any taller since it allegedly has more normal RPM @ highwar speeds, so maybe a slightly larger rear might be considerable as that would shorten the ratio a little, increase rpm @ speed slightly. Anyway, will have to wait and see.
 
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Discussion Starter · #7 ·
Really advising new riders to change their sprockets? They need to log a lot of miles stock before deciding on this

I don't think a -/+ change is a good idea on small street bikes because they already hit high rpms at freeway speeds...

I am obviou


Really advising new riders to change their sprockets? They need to log a lot of miles stock before deciding on this

I don't think a -/+ change is a good idea on small street bikes because they already hit high rpms at freeway speeds...

I am obviously in the minority because so many people change them...but everyone needs to be aware they make your speedometer terribly inaccurate (without investing another couple hundred on a speedo healer) AND wreck your highway gas mileage.

You can be like my stupid friend on his R6 with +3 in the rear and -1 up front and think you're going 70 when you're actually going 56
 
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Discussion Starter · #8 ·
I am considering dropping one or two teeth in the rear (-2) when the sprockets come out.

The bike will then hit 60mph in 2nd gear, the speedo will be dead accurate, and my highway RPMs will be lower so gas mileage will be higher :)

Who cares about


I am considering dropping one or two teeth in the rear (-2) when the sprockets come out.

The bike will then hit 60mph in 2nd gear, the speedo will be dead accurate, and my highway RPMs will be lower so gas mileage will be higher :)

Who cares about the little bit of acceleration loss? It's already slow compared to other bikes and I don't care ;) I love it!
 
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Discussion Starter · #9 ·
I was going to install my plus one front today, so i went to the store to buy socket and they wanted $12.99 for 1 socket. No Way! I will try going to harbor freight her in a couple of days.

I was going to install my plus one front today, so i went to the store to buy socket and they wanted $12.99 for 1 socket. No Way! I will try going to harbor freight her in a couple of days.
 
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Discussion Starter · #10 ·
[QUOTE="Mike, post: 1195"]You can be like my stupid friend on his R6 with +3 in the rear and -1 up front and think you're going 70 when you're actually going 56[/quote]

On my 250 the speedo is attached to the front wheel so the only thing that affects it is


You can be like my stupid friend on his R6 with +3 in the rear and -1 up front and think you're going 70 when you're actually going 56
On my 250 the speedo is attached to the front wheel so the only thing that affects it is changing front tire size. Not sure how the speedo on the 125 works, is it based on engine speed and not front wheel speed?
 
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Discussion Starter · #11 ·
[QUOTE="ionized, post: 1217"]On my 250 the speedo is attached to the front wheel so the only thing that affects it is changing front tire size. Not sure how the speedo on the 125 works, is it based on engine speed and not front wheel speed?[/quote]

Since


On my 250 the speedo is attached to the front wheel so the only thing that affects it is changing front tire size. Not sure how the speedo on the 125 works, is it based on engine speed and not front wheel speed?
Since its digital I assumed it was...like my CBR

Anyone know for sure?
 
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Discussion Starter · #12 ·
The Speedo on the 125 is not ran off a cable like on the 250r

The Speedo on the 125 is not ran off a cable like on the 250r
 
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Discussion Starter · #13 ·
[QUOTE="cbzdel, post: 1306"]The Speedo on the 125 is not ran off a cable like on the 250r[/quote]

Figured it wasn't because of digital speedo and the event data recorder


The Speedo on the 125 is not ran off a cable like on the 250r
Figured it wasn't because of digital speedo and the event data recorder
 
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