how many teeth more on the back sprocket?

funkymonkey · Aug 24, 2008

Hi all,
Thanks for all your advice on the rad covers, i'm gonna go for the black ones.
My question today is: I want to improve the gearing on my 2008 tuono R as it seems a lil long, i was going to go down 1 tooth on the front sprocket but i have been told to go up 2 teeth on the back instead as this would improve the handeling too, am i right in thinking going down 1 on the front is the same as going up 2 and a bit on the back? am i better off going up 3 on the back sprocket? all replies most welcome....cheers...:thumbup

crashtd · Aug 24, 2008

you'd have to check the gearing worksheet in the file vault, but i believe -1 in front = +3 in back. :O

never heard the handling argument before...i guess going down in the front would technically give you better handling...but i think it would be minimal at best.

-:banana

welshtuono · Aug 24, 2008

Gearing

Hi M8,
Made it on here......You deffo need to go down one tooth on the front sprocket and a lot of guys on the other Aprilia forum recommend going up 2 teeth on the rear as well:thumbup. On mine I have just gone down 1 on the front until I have to change chain and sprockets.

On my Tuoldo Racing I went down 2 teeth on the front and up 2 teeth on the back:lol It was like a firecracker:yes

I also tried the bodge I told you about for the back brake, I hung a container of 4 litres of oil off the rear brake pedal overnight last night and my back brake was good today.

The meet I told you about is next Saturday 9.30 at Newtown Mcd's:thumbup

funkymonkey · Aug 24, 2008

Nice 1 buddy, glad you made it here..... i was advised to go up on the back as this would make the bike handle better as it pulls the wheel further forward, Nice one about the Newtown meet i will try my very best to be there, i may have to pull a sicky off work.....

Sid · Aug 26, 2008

I've gone from 17/42 to 16/43 on my 2004.

That works well for me.

B o B · Aug 27, 2008

On my '04 model I've gone to 16/44. Hairy!

Batfastard · Aug 27, 2008

B o B said:
On my '04 model I've gone to 16/44. Hairy!

Yeah 16/44 is what I run on my 05 - loads of fun.
On the Gen II some of the lads run 15/42 which is about the same.

Tempest · Aug 27, 2008

New to the forum and new to the Tuono. Mine gets delivered on the 5th. A common theme seems to be to go down 1 tooth on the front. Can anyone reccomend a good UK mail order place and some details of the sprocket needed.

Cheers

Batfastard · Aug 27, 2008

Tempest said:
New to the forum and new to the Tuono. Mine gets delivered on the 5th. A common theme seems to be to go down 1 tooth on the front. Can anyone reccomend a good UK mail order place and some details of the sprocket needed.

Cheers

B and C Express in Louth (Nr Cadwell) are Renthall stockists

Tempest · Aug 27, 2008

Sprocket on order. Thanks

dazzza67 · Aug 27, 2008

Is the speedo affected by the sprocket change?

Batfastard · Aug 28, 2008

dazzza67 said:
Is the speedo affected by the sprocket change?

No.

Tuono Speedo counts pulses from the rear disc bolts - altering final drive ratios has no affect on speedo accuracy.

dazzza67 · Aug 28, 2008

V60Paul said:
No.

Tuono Speedo counts pulses from the rear disc bolts - altering final drive ratios has no affect on speedo accuracy.

Cool, it's a pity the japanese don't use the same system, i changed the gearing on my Blade once and needed a maths degree to work out how fast I was going!!

Thunder · Aug 28, 2008

Going with the 15/42 will shorten the wheel base a little, in doing so it can help handeling.
I don't know if 16/43 will work with stock chain???

Falco9 · Sep 6, 2008

I'm running 15-42 and it's fantastic (saves a fortune on front tyre wear as well):lol:lol

15-42 will fit with the std chain but I think 15-43 might be tight unless you're chain is well worn. I doubt 16-43 would fit with the std chain unless you know better anyone??)

F9

Towie · Sep 7, 2008

Hi Falco9 am going to change to a 15 front & leave 42 rear when i put on a new rear tyre this week, did it shorten the gearing much & make 5th easier to use cruising..cheers

RBD914 · Sep 9, 2008

My 08 Factory comes with a spare front sprocket "for racing use" - I'm assuming it's a 15 tooth - anybody confirm?
What effect / advantages does it have fitting this over standard?
Rob

Falco9 · Sep 9, 2008

RBD914 said:
My 08 Factory comes with a spare front sprocket "for racing use" - I'm assuming it's a 15 tooth - anybody confirm?
What effect / advantages does it have fitting this over standard?
Rob

Yup, I'd bet it is the 15t front (not too hard to count em eh? (LOL))

A very worthwhile swap, improves drive no end, handy around town where you'll normally find yourself slipping the clutch at low speed etc...knocks a few mph off the top end but even on 15-42 (std is 16-40) I can see 150mph+ easily.

And if you like saving on front tyre wear, 3rd gear wheelies no problem :thumbup

Worth a swap, easy to do just remember to loctite the sprocket bolt back in and torque it to the correct setting

F9

RBD914 · Sep 10, 2008

Falco9 said:
Yup, I'd bet it is the 15t front (not too hard to count em eh? (LOL))

A very worthwhile swap, improves drive no end, handy around town where you'll normally find yourself slipping the clutch at low speed etc...knocks a few mph off the top end but even on 15-42 (std is 16-40) I can see 150mph+ easily.

And if you like saving on front tyre wear, 3rd gear wheelies no problem :thumbup

Worth a swap, easy to do just remember to loctite the sprocket bolt back in and torque it to the correct setting

F9

Just counted the teeth Falco and you are right, it is a 9t front sprocket. Might have it fitted at first servvice next week!
Rob

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how many teeth more on the back sprocket?

funkymonkey

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B o B

Batfastard

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Tempest

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Batfastard

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