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TBParts - 146cc Bore kit
VM 26 Carb kit & TB HC Piston for GPX & YX Engines

Vital Information
Part No TBW9069
Stock Level In Stock

TB GPX & YX 146cc Top End KIT

OD of cylinder skirt is 59mm

Meets or Exceeds OEM Specifications.

Key Features:

  • All inclusive kit for a substantial power gain over stock
  • All aluminum cylinder for greater heat dissipation over stock
  • VM26 Mikuni carb for dependable, consistent performance


  • Sta-bil fuel stabilizer - W-57-1109
  • Uni foam filter spray - W-82-1000


  • Pitster Pro 125
  • GPX 124cc
  • THUMPSTAR 124cc
  • BRAND X MINI 125
  • UPC 125
  • EVOS
  • KRP
  • OGM/YX 140 (not steel Cylinder lifan type)
  • GPX 140
  • Pitster pro X2 or X4 140cc
  • Piranha 125 & 140 (not steel Cylinder lifan type)
  • Xtreme 124cc Typhoon

For use with LF 27/23 or TB 30/23.5 heads use TBW9066

Kit Includes:

  • TBW0601 - Cylinder
  • TBW0424 - Gasket set
  • TBW0823 - Piston
  • TBW0301 - Throttle cable
  • TBW0433 - Intake kit
  • TBW0399 - VM26 carb
  • TBW0413 - Air filter

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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.


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