ST4 Sprocket Ratio preference ??? - Ducati.ms

killdorann · Aug 26th, 2009, 1:18 pm

I have seen this subject talked about alot but my eyes/brain hurt from searching for answers. I have to replace my chain and am goin to replace both sprockets as well. As I have seen these bikes are ruff to ride in town. While my commute is on the freeway I do also ride into town periodically during the week. I have seen so much talk about 14 vs. 15 tooth front and 42 vs. 43 rear that I would like to see a condenced version of answers in one place. Maybe I am blind but I cant find this on the forum's so if this type of thread has been submitted point me in that direction or better yet just post up what ya run so I dont have to search the forums again

mad · Aug 26th, 2009, 2:09 pm

Sprocket/Gearing Recommendations

Read first and then look for second post from Shazaam a few posts down for the table.

tonered · Aug 26th, 2009, 2:15 pm

I've only have my ST on the original ratio (15/43). I can say that is works great for me around town and on the road. It could be a bit lower, but my speedo indicates that the clutch is fully engaged at about 5mph-ish. I rev a little over 4k at 70mph. So, I've go rideability and fuel economy. Seems to be a good balance.

Lumpy off idle can be sorted with a go TPS setup and TB balance.

BTW, I'm pretty close to needing a chain and sprockets. I'm only considering the 15/43 ratio.

Have a good one.

Shazaam · Aug 26th, 2009, 2:42 pm

I agree, the standard 15/43 is the best overall gearing for the ST4.

MarkST · Aug 26th, 2009, 3:37 pm

Quote:

Originally Posted by Shazaam

I agree, the standard 15/43 is the best overall gearing for the ST4.

I much prefer the 14/43 on my ST4. I am very familiar with your excellent piece on all the different ratios/factors etc, and am prepared to live with slightly lower chain life.
I have recently aquired an ST4s, and was pleasantly surprised that I am very happy with the standard 15/38 - much better all round than I found the ST4's standard 15/43 setup.

st2lemans · Aug 26th, 2009, 3:41 pm

Quote:

Originally Posted by MarkST

I much prefer the 14/43 on my ST4.

I also use the same on my ST2.

Tom

PeteST4 · Aug 26th, 2009, 11:09 pm

G'day.....

14/43 for me, much more user friendly about town and a bit zippier in the twisties!..

620rossco · Aug 27th, 2009, 12:56 am

Just booked by 03st4s in for a new chain and sprockets. Standard is 15/38, wanted to put on 15/40 but they only had a 15/39 combo in stock. Still have time to change my mind, it sounds like it might be still a bit high. They had 41/42/43 rears in stock but I'm worried thay might be a bit low for the open spaces down here.

Any comments would be appreciated.

killdorann · Aug 27th, 2009, 12:59 am

Quote:

Originally Posted by mad

Sprocket/Gearing Recommendations

Read first and then look for second post from Shazaam a few posts down for the table.

Na not blind just wanted more than one man's opinion. Shazaam's piece is incredibly detailed but once again he's just one person. I always like lots of input when I am trying to reach a decision like this.

This can't be all the ST4 owner's on the forum's is there anyone else that would like to chime in

nickn · Aug 27th, 2009, 7:00 am

Quote:

Originally Posted by 620rossco

Just booked by 03st4s in for a new chain and sprockets. Standard is 15/38, wanted to put on 15/40 but they only had a 15/39 combo in stock. Still have time to change my mind, it sounds like it might be still a bit high. They had 41/42/43 rears in stock but I'm worried thay might be a bit low for the open spaces down here.

Any comments would be appreciated.

15/43 still good for 250-260kmh in 6th.