Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Sport Touring: ST4 / ST3 / ST2 > 15 / 43 sprockets

[moozaad]

recommended for an ST2?

I think I have the smaller 14t front and standard rear sprocket on at the moment but find it noisy and 'whines' alot. So I want to change it but keep that little extra power!

[andys 900ss]

Try a 45 on the rear with the 15 front.

My ss dont whine, it THUMPS!! Cant here anything over the cans and clutch.

Andy

[Rushjob]

ST2 standard is 15/42, ST4 is 15/43 and ST4S is 15/38
I run 15/43 on the 4S and it's great.....
As Andy suggests, up a bit on the rear would help with a 15 front... you'll find that the whine is the chain rubbing on the upper chain buffer on the top side of the swingarm at the pivot end.
It gets worse if you add a bit of ride height too.
The 15 tooth front should get rid of the problem for you.

[moozaad]

So to confirm Andy's idea: 15/45 is a good idea? Will that work with a standard length chain?