The engine was based on the TL1000 powerplant, but with over 300 refinements reflecting both its less-hardcore intent and additional development time. The 996cc liquid-cooled 90-degree V-twin sports the same bore and stroke of 98mm x 66mm, but that's about it. The DOHC four-valve cylinder heads feature smaller 36mm intake valves (from the TL's 40mm poppets), single instead of dual valve springs, slightly reshaped intake ports for better velocity at lower rpm, and retimed intake cams for more overlap. Lighter forged pistons (by 15 grams each) replace the cast TL units, with thinner and lighter connecting rods (by 30 grams each) and a smaller-pitch cam chain for the hybrid gear/chain cam drive reducing reciprocating weight even further. The engine was fed by 52mm throttle bodies with Suzuki's SDTV secondary throttle valve system similar to the GSX-R series to smooth out off-idle throttle response. Unique to the SV system, though, was that the primary (rider controlled) and secondary (ECU controlled) throttle plates were closer together so that they overlap slightly at full throttle, helping keep the throttle body assembly shorter for better top-end power and increased airbox volume. Compression was 11.2:1 with forged pistons, and the engine cranked out 111.2 horsepower and 70.7 ft-lb of torque. Peak horsepower was down a smidge from the original TL engine, but the powerband was broader.