These transmissions are available as stock replacement or with extended main shaft and main drive gear and all parts you need to offset the primary for Wide Tire conversions and custom builds. Transmissions feature the 1994-2006 type "Low Noise" gears and shafts, machined from Ultra Strong 20ChMnT High stress gear steel, tempered and stress released to a core hardness of 35 to 45 Rockwell, and a surface hardness of 58 to 60 Rockwell. All transmissions have the hole for the 1996-up electronic speed sensor closed off with a removable plug. All take a 1994-2006 style final belt drive pulley, but 45mm offset transmissions include a special 1994-2006 style offset pulley. Transmissions come assembled. Just install, oil up with the included Spectro Transmission oil and put into gear. Gears and shafts feature a 5 year or 100.000 km limited warranty.