[Mojoe]

I'm thinking about going up one tooth on the front sprocket, that would put me pretty close to accurate right?

I'm doing this because I want to be at lower RPMs on longer freeway trips, and all out mad accel isn't what's important to me

Logically, that would have the opposite impact to your bike as would decreasing the front sprocket tooth count. You speedometer will be roughly accurate but your odometer will be over-reporting your mileage.

Hrmm... i partially disagree. I would think that going up one tooth in the front should make you odometer UNDER-report mileage.

Ahhh...
Because the rotation of the front sprocket is increased while travelling at a slower actual speed,
the odometer reading would display more miles accumulated than actually travelled.

Likewise the indicated MPH is higher than actual as well.

ok...you guys are getting confusing here. isn't it as simple as this?

smaller sprocket turns faster = speedo stating going faster than you really are + mileage adding up faster.

learger sprocket turns slower = you going faster than speedo is registering + lower mileage adding up.

[Kat-A-Tonic]

and why do you say loc-tite is a must? dont you have a washer behind it with a tab that you flip over against the nut so it holds it in place? you should have.

Unfortunately, I don't have a good answer for you other than the Loctite was recommended by a Suzuki mechanic. I didn't question the recommendation at the time. I can ask him the next time I see him.

[Mojoe]

I'm thinking about going up one tooth on the front sprocket, that would put me pretty close to accurate right?

I'm doing this because I want to be at lower RPMs on longer freeway trips, and all out mad accel isn't what's important to me

Logically, that would have the opposite impact to your bike as would decreasing the front sprocket tooth count. You speedometer will be roughly accurate but your odometer will be over-reporting your mileage.

Hrmm... i partially disagree. I would think that going up one tooth in the front should make you odometer UNDER-report mileage.

Ahhh...
Because the rotation of the front sprocket is increased while travelling at a slower actual speed,
the odometer reading would display more miles accumulated than actually travelled.

Likewise the indicated MPH is higher than actual as well.

ok...you guys are getting confusing here. isn't it as simple as this?

smaller sprocket turns faster = speedo stating going faster than you really are + mileage adding up faster.

learger sprocket turns slower = you going faster than speedo is registering + lower mileage adding up.

that's it...isn't it?

[Mojoe]

and why do you say loc-tite is a must? dont you have a washer behind it with a tab that you flip over against the nut so it holds it in place? you should have.

Unfortunately, I don't have a good answer for you other than the Loctite was recommended by a Suzuki mechanic. I didn't question the recommendation at the time. I can ask him the next time I see him.

ahh...ok. i am not a big fan of loc-tite myself unless it is for something I am not likely to remove in the near future.
But yes, there is a washer designed for this. it is the one here in the pic. mine is different in the sense that it folds against the nut to hold it in place. very practical, imho.

[img][/img]

[Kat-A-Tonic]

I'm thinking about going up one tooth on the front sprocket, that would put me pretty close to accurate right?

I'm doing this because I want to be at lower RPMs on longer freeway trips, and all out mad accel isn't what's important to me

Logically, that would have the opposite impact to your bike as would decreasing the front sprocket tooth count. You speedometer will be roughly accurate but your odometer will be over-reporting your mileage.

Hrmm... i partially disagree. I would think that going up one tooth in the front should make you odometer UNDER-report mileage.

Ahhh...
Because the rotation of the front sprocket is increased while travelling at a slower actual speed,
the odometer reading would display more miles accumulated than actually travelled.

Likewise the indicated MPH is higher than actual as well.

ok...you guys are getting confusing here. isn't it as simple as this?

smaller sprocket turns faster = speedo stating going faster than you really are + mileage adding up faster.

learger sprocket turns slower = you going faster than speedo is registering + lower mileage adding up.

that's it...isn't it?

You are both correct. A larger sprocket would cause odometer under-reporting while a smaller sprocket would cause over-reporting. Pardon the confusion.

[BobKat2002]

That's what I said

[seypea]

I just did my sprocket change except I went +3 in the back. I agree w/ mojoe, and excellent mod. After reading the tons of threads, I was a little hesitant at first of going ballz on the throttle cause I thought it'd jump up and stuff but really it doesn't, but you gain much in terms of accelleration and you can feel it wanna pick up, but no worries. Also I was pretty worried about the highway rev range, but really not bad for me at all, perhaps its the earplugs Definitely worth it.

On a side note, my speedocalculation on going from a 15/45 stock setup to a 15/48 was to calibrate the speedohealer -12.1% perhaps the difference is w/ front vs rear sprocket change? My speedo now reads right on to my checks! Also below is the thread I posted w/ pics of the install of the speedohealer!

http://www.katriders.com/forums/viewtopic.php?t=20662

[blackkat98]

To arrive at -12.1% correction, you used the default +5.5% for factory speedo error. I thought you said in another post that you calculated it to be +8.3%? So, if you plug in +8.3% for factory speedo error and the +6.7% error for your 15/45 to 15/48 sprocket change, your correction value should be more around -14.4%. Why did you decide to correct only for the sprocket change and leave the stock speedo error in there?

[seypea]

To arrive at -12.1% correction, you used the default +5.5% for factory speedo error. I thought you said in another post that you calculated it to be +8.3%? So, if you plug in +8.3% for factory speedo error and the +6.7% error for your 15/45 to 15/48 sprocket change, your correction value should be more around -14.4%. Why did you decide to correct only for the sprocket change and leave the stock speedo error in there?

Think you got mine mixed up w/ someone elses. I changed my back sprocket and kept the factory speedo error. Using the online calculator it was -12.1, I just used the setting they put out, and it seems right on!

[Gripp]

I'm confused (which is normal) I have a 14 tooth on the front so how bad is my speedo going to be out 100kph I figured around 6kph. I think.???

[blackkat98]

yea, i've lived with the speedo being off BEFORE the sprocket change, so i think i'll just adjust for the sprocket change only. That way, the odometer will still be at the same setting as stock.

[Kat-A-Tonic]

I'm confused (which is normal) I have a 14 tooth on the front so how bad is my speedo going to be out 100kph I figured around 6kph. I think.???

Standard is 15 teeth for the front sprocket. Your speedometer will be off by about 15kph at 100kph because of the built in over-reporting and the +7.14% induced by the smaller sprocket.

[Kat-A-Tonic]

To arrive at -12.1% correction, you used the default +5.5% for factory speedo error. I thought you said in another post that you calculated it to be +8.3%? So, if you plug in +8.3% for factory speedo error and the +6.7% error for your 15/45 to 15/48 sprocket change, your correction value should be more around -14.4%. Why did you decide to correct only for the sprocket change and leave the stock speedo error in there?

Actually, this is someone else. We both have similar bikes except Seypea has the nicer rims.

[TheKlic]

wow, sorry for the partial hijack kat-a-tonic
lol

[Kat-A-Tonic]

wow, sorry for the partial hijack kat-a-tonic
lol

Actually, it's a good thing. I'm wondering if I should post something on the Speedohealer I've installed?