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TBParts - 187cc to 201cc KIT
GPX Pitster YX Piranha Lifan SSR

Vital Information
Part No TBW9144
Stock Level 2 Left

187cc to 201cc Bore Kit (67mm) for YX/GPX/ Zongchen 150cc to 160cc engines with KLX110 type top ends.

Case boring required for most engines.

Key Features:

  • Ceramic coated, all aluminum cylinder
  • Lightweight piston for crisper throttle response
  • Gasket kit included

Must use with the Race Head V2 or check clearances carefully (not tested with other heads at this time).


  • Sta-bil fuel stabilizer - W-57-1109

There are no installation instructions, but if you can replace your piston, you can install this kit. If you don't have any experience working on your engine, we highly recommend having a professional technician install this kit. The parts are installed in the same manner as OEM parts.

Kit Includes:

  • TBW0897 - Cylinder
  • TBW1007 - Gasket set
  • TBW0758 - Piston

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Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online Pit Bike Technical Info Database!

We have all necessary support parts on hand.

Most orders ship same, or next business day, unless otherwise noted above.