17 Tooth Counter Shaft Sprocket, anybody tried it?

I'm glad I found this forum as its full of helpful stuff.
I'm considering reducing my engine sprocket to 17 tooth as I hear it improves speed but reduces top speed which I rearly use. Has any one tried this?

going down 1 on the front is like going up 3 on the rear or close enough

Yes 17t helps acceleration
RPM will increase for the same road speed in any gear and it ends up increasing RPM by about 500 in top gear at 110kph
Your speedo will read fast by about 13% or so after the change
If you use the standard length chain and rear sprocket it will move the rear wheel back by about 1 - 1.5 alignment marks on the swing arm
The job takes about an hour if you muck around

I have done it but changed it back after a short time because I decided it's not for me and the way I ride the bandit.

I have a 17t front sprocket for sale if you are interested

Ive never tried it...
i just thought id say WELCOME to the site

dhula wrote:.

I have a 17t front sprocket for sale if you are interested

I've been wanting to give one a go; how much are you asking?

Cheers Peter

$20

Here is the add

happy to negotiate

dhula wrote:$20

Here is the add

happy to negotiate

Sounds OK PM sent,

Cheers Peter

Installed the 17T countershaft sprocket I bought off Dhula, so far gotta say I like it

Early days yet but the gearing feels closer and comes out of the corners corners around town nicely. Put it on for a track day on the 19th at Marulan driver training centre but will probably keep it until I go stage 2.

Cheers

I picked up my 17 tooth sprocket today .At $18 thought it was worth a go .Trouble is 100 to 200mm of rain is predicted this weekend .
Yep its pouring .
I have a shorter chain than most so a smaller front sprocket should put the back wheel about half way on the notches .

gus wrote:I picked up my 17 tooth sprocket today .At $18 thought it was worth a go .Trouble is 100 to 200mm of rain is predicted this weekend .
Yep its pouring .
I have a shorter chain than most so a smaller front sprocket should put the back wheel about half way on the notches .

Sounds like you need to move to sunny Sth. Aust Gus

yep Ive got one on mine....its a pisser about the speedo..I wish they'd take a reading from the front wheel like bikes of old...But I digress....its a bit of shagging about to get it on..front wheel feels a bit lighter now in first..top end is a little reduced...but not much..the gear ration defiantly feels closer now...its also a little easier to ride in slow traffic in a higher gear...but if you want my honest opinion...it aint worth the mucking about..and I expect Ill be changing back to stock ..I don't think the bandit needs lower gearing..just needs more midrange and high end....but that's motor and induction work

Had no problems fitting ,30 mins max .Push wheel forward do not remove chain
Blue dot is joining link so i can keep an eye on it ,see it works .




The old cush drive sprocket has 41,000 kls on it .You can see its worn more on one side of the teeth .Not bad but 3/4 to stuffed .


It moves wheel back (smaller sprocket ) about one notch .Ive removed links from my chain so it now sits about middle .The standard chain doesnt
need to be that long .

It increases fuel consumption, increases tyre wear, but also increases factor

For touring or if you're worried about fuel consumption I would say it's not worth mucking about, but as per Gus' pics it's an easy mod. So you can chop and change if the mood permits

Seeing ive got a speedo healer any idea what i sould set it to now ive changed to a 17 T sprocket .

Gus, I set mine to 10%. Seems to be pretty close

after a ride on the freeway yesterday... I've changed mine back to stock...too much vibration sitting a 4000 rpm to maintain a decent speed ..

if anyone wants a 17 tooth sprocket with under 500 Ks on it for $20...let me know,,,

Here we go , speedo reads 10% faster or slower .I have the healer set at 7% for a fast reading speedo add another 3%?

gus wrote:Seeing I've got a speedo healer any idea what i should set it to now I've changed to a 17 T sprocket .

use the speedohealer online calculator to get pretty close.
If you use their numbers you won't be spot on rather still reading faster than actual. IMO this is a good thing as you won't get a fine (unless you speed of course)

I can't remember exactly what I set mine to in the end when I had the bandit. I used my GPS to work it out then went for a ride and did the trial and error thing till I was almost spot on (like 1kph out)
As an example if SH said set to 7.8, then I was at 8.2 kinda thing

Went for a ride and i like it 110= 4 grand in 6 th . so you are more in the power area .5th would give you about 4.5 revs spot on for me .
Didnt feel and more vibes ,bike felt sporty (kind off ).So far so good .It was raining so no antics .

can somebody please post a how to on removing the front sprocket ?
I want to try a 17t as well but seems like a lot of work to get to it

Look at the two pics on page 1 . Its an easy job .Get someone to sit on bike with foot on rear brake as you undo BOTH sprockets nuts . One is an
allen head bolt ,the other large one you may need a large bar or old large tension rench it 115 nm tight i think .Sprcket will slide off with chain on .
THe outer cover is just 8mm bolts .No springs ,no ball bearings.

I've been toying with the idea of a sproket change due to the heavier setup with the addition of the sidecar and some touring we want to do soon. Some of you may also have noted the rear tire on mine is a 205/45ZR17.

Pooring over the info and setting up a spreedsheet (yes I have trouble sleeping) I have come up with these calculations:
Original tyre (180/55-17) has a dia of 0.630m, circum of 1.979m, does 505.211 revolutions per km, 55573.2 for 110kms.
The original sprokets 43/18 have a reduction of 2.389, 6th gear reduction is 1.071, and primary reduction is 1.537 giving a total reduction of 1.65.
Therefore engine rpm for 110kph should be 3643 - these are all calculated figures and will vary in real life due to other factors such as tire wear and inflation etc. - if I have messed up any of the calcs please correct me.

With my smaller back wheel and using these same calcs I end up with 3723 rpm (2.2% more rpm - consistent with the tire being 2% smaller).

A 17 tooth front sprocket will change final rpm to 3942 (almost 300rpm more in top over standard). A 19 tooth will drop rpm to 3527 (116 less).

There was also some comments on other forums about the new sprockets being noisier as they don't have the rubber damping on the sides (although it was mentioned that the 01-06 GSXR-1000 has an OEM 17 tooth with the damping.

So the query is (other than are the figures correct), do I gear up (17) for more power due to the additional weight, or down (19) for better milage.

There is no way I would be making the gearing taller than stock.
So shorter in your case makes sense.
The only issue then is first gear becomes even more useless. Why the hell its so short with that amount of torque I'll never know.
For what its worth my FZ turns at 4,100 at 100 (true) and returns better fuel economy.
Yeah I reckon the B1250 is over geared.

One tooth less on the front is the best mod i have done .It suits the way i ride as i like to be at least near the power band.
.There is no way i would refit the standard sprocket and it only cost $18 .Slighly less than a powercommander . And no dyno needed , seat
of the pants dyno works well .

If you have a naked Bandit a 17th front sprocket is a "must have ". Being naked there is no way you will miss the higher speed .Its all about
0-160 after that its just silly on a naked .

6th gear at 110 kph = 3,900 rpm
5th gear at 110 kph = 4,200 rpm (nice )

How does the speedo healer work? Im new to these bikes and my speedo seems to be way off. I fitted a bicycle speedo today to get an idea how far out it is.