TB Parts 165cc Big Bore Kit
- NEW The all aluminum ceramic plated 64mm cylinder now comes with skirt (picture is not updated yet showing change)
- NEW We increased the skirt height and size on the lightweight high compression 64mm piston with rings, pin, & clips to increase reliability and service life (picture is not updated yet showing change)
- Head gasket kit - includes the cylinder head o-ring set and an exhaust gasket.
This is our most affordable 165 bore kit for the Z125. The kit includes an all aluminum ceramic plated 64mm cylinder which will increase your engine displacement to 165cc. This cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction (increasing power), improves sealing, and provides better heat transfer (runs and cools down quicker). Additionally, our head gasket kit includes a head o-ring set and exhaust gasket so you don't have to re-use your old ones or make a trip to your local dealer to get new ones and spend more money. These are high quality parts and definitely will dramatically increase the power and fun factor on your bike!
IMPORTANT NOTE: Any bore kit for the Z125 must be used with an aftermarket fuel controller to prevent a lean condition and damage to your engine
IMPORTANT NOTE: Installation requires engine disassembly and case boring. Therefore, we highly recommend a professional technician install this kit and the cases bored by a reputable machine shop. If you plan on installing the kit yourself, we highly recommend purchasing the shop manual for your bike available in this section or from your local Kawasaki or Suzuki dealer. The parts are installed in the same manner as the OEM parts. Also, while the engine is disassembled, you might consider the following options:
