One of the first modifications I did to my 748 was to change the ratio from the stock 14/38 to 14/40 (as recommended by Shazaam's table that Chuckracer linked to).
As Shazaam states:
Quote:
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"Ducati decides what front and rear sprocket sizes to install on each model depending upon a number of objectives and constraints. The standard gear ratio is a compromise that considers fuel economy, performance, and the need to meet environmental laws that limit exhaust gas emissions."
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I decided on the 14/40 ratio after discussing it with Steve at ECS (
European Cycle Services) and based on my riding style and objectives (street only).
ECS installed a 520 D.I.D. gold chain with a Supersprox Stealth 40-tooth rear (since I don't use the 748 for the track) and a 14 tooth front.
I think it is the most significant change I made to my 748. Adding two teeth to the rear made a huge difference. I feel it is what should be on the 748 if noise emissions and such weren't an issue.