index gear ratio chart for final drive pulleys transmission pulley stock 5- ... 29 30 and 31-tooth pulleys provide stronger acceleration while larger 33 and 34- ... pulleys will raise the engine speed for stronger acceleration 1993 softailŽ models came ... other big twins equipped with rear belt drive units since 1980 have 70-tooth rear ... pulleys primary drive ratios a primary ratio of 1.54 24/37 ... includes 32-tooth front pulley mounting screws lock plate sprocket nut pulley spacer ... gaskets tranny clutch andrews final drive pulleys change your final drive ratio ... twins from 1985 to present 85-93 94-05 driveline aluminum transmission drive pulleys by ... belt drives limited all new lightweight 7075 super ... strong aluminum transmission pulleys weigh ... of sizes permits fine tuning of final drive ratio includes a new spacer shaft nut ...