14T front sprocket S4Rs

[leslie_dash]

Had anybody fitted a 14T front sprocket to and S4Rs or S4R Testastretta. I hoping to make it a bit smoother lower down, as it's a a bit lumpy as standard.
Thing is it already wheelies far too easily, how much difference with the 14T sprocket make?

[Nickj]

Wheelies on 14T .... That'll be even easier with the lower ratio !!

As the engine has it's fuel management set up to meet the euro 2 or 3 regs it will be fairly poorly mapped at the bottom and top end. I don't know (but I'm sure someone will let us know) but remapping ought to make the motor much sweeter to run at lower revs.

[J.P]

I have one of the S4R Testastretta's.
Yep that's right about the re-mapping for the lower end to smooth it out but you can only do that if you have a Power Commander or the like fitted and the bike has a Ducati Performance Chip fitted, like the S4RS does as standard, or you get one fitted like me as an after market mod.
I also had the 14 tooth sprocket fitted prior to that and it does makes a difference at the lower end. As a fairly simple and cheap change it is definitely worth it.

[254graeme]

Yo, just done mine and it has smoothed the rattle away and given a bit more drive. A very modest but great mod.

[leslie_dash]

Cheers guys, sounds like 14T front sprocket is the thing to do then. Didn't realise the S4RS has a Ducati Performance ECU fitted as standard?

[J.P]

What you need to do now Leslie is to whack a power commander on there and the difference is amazing.

[leslie_dash]

How much was the power commander?

[J.P]

You know what Leslie, I had a dream about this conversation last night, and in my dream I corrected myself abou the S4RS have the performance Chip as Standard. It only comes with the new upgraded exhaust system. Sorry for being a plank.

Anyway the Power Commander was about £300 and the Dyno time to set it all up was another £150-£175 if I remember. All in all it's a costly mod because you need a new exhaust system without the catalytic converter, a new ECU, power commander and some dyno time.
All about £1500

[leslie_dash]

I think I'll just get a 14T front sprocket fitted for now, thanks for the info though.