2003 Ducati SportTouring ST4 Owners Manual - Page 156

E Transmission Dry clutch operated by a control lever on left handlebar. Drive is transmitted from engine to gearbox main shaft via spur gears. Gear ratio: 32/59. 6-speed gearbox with constant mesh gears, gear change pedal on left side of motorcycle. Front/rear sprocket ratio: 15/42 (ST2); 15/43 (ST4). Total gear ratios: 1st gear 15/37 2nd gear 17/30 3rd gear 20/27 4th gear 22/24 5th gear 24/23 6th gear 28/24 Drive chain from gearbox to rear wheel: Make: DID Type: 525 HV. Size: 5/8"x5/16" Links: 102 Important The above gear ratios are the homologated ones and under no circumstances must they be modified. If you wish to tune up your motorcycle for competitive trials, you may refer to Ducati Motor Holding S.p.A. who will be glad to provide information about the special ratios available. Relevant instructions and original spare parts are available from your local Dealer or authorized workshop. Warning If the rear sprocket needs replacing, contact a Ducati Dealer or an authorized workshop. If improperly replaced, this component could seriously endanger your safety and that or your passenger, and cause irreparable damage to your motorcycle. 74