Home » TB 108cc Big Bore Kit, V1 Race Head, & 26mm Mikuni VM26 Carb/Kit – Honda 50cc & 70cc Various Models
HONDA ATC70 108CC RACE HEAD BIG BORE STROKER CRANK CARB HEAD KIT TBW9095 52MM - Factory Minibikes
HONDA ATC70 108CC RACE HEAD BIG BORE STROKER CRANK CARB HEAD KIT TBW9095 52MM - Factory Minibikes
TB Parts

TB 108cc Big Bore Kit, V1 Race Head, & 26mm Mikuni VM26 Carb/Kit – Honda 50cc & 70cc Various Models

In stock
$ 599.95 USD
TB 108cc Big Bore Kit, V1 Race Head, & 26mm Mikuni VM26 Carb/Kit – Honda 50cc & 70cc Various Models

TB Parts 108cc V1 Race Head Kit, 52mm Bore Kit, &  Mikuni VM26 Carb/Kit. Converts the following stock engines to 108cc: 4 speed CT70H, SL70, and XL70. Also for 81 & up ATC70 and 3 speed 80-81 CT70

Starting with the V1 cylinder head’s larger 25/22mm stainless steel (21-4N) valves, better porting, larger cam, improved valve geometry and superior quality this new setup will rev quicker, farther, and make much more power than the stock setup. Add the lightweight high compression 52mm bore kit that brings up the bore to 108cc and makes for a stronger power band. Finish it off with Mikuni’s VM26 carb in our carb kit adding up to a high level of performance at an affordable price! These kits can can make as much power as the larger 125cc Chinese engines. These are high quality parts and require no machining to the cases or other modifications – bolt on and go! 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 or, at a minimum, purchasing the shop manual.

Key Features:
  • Race Head V1 – 25/22mm Stainless (21-4n) Valve, 21mm intake port, oversized exhaust port, & improved valve geometry (valve, seals, and springs installed).
  • Race Camshaft and Sprocket
  • 52mm Aluminum Steel Sleeve Cylinder
  • 52mm High Compression Light Weight Piston Kit (91+ octane pump fuel friendly)
  • 52mm/108cc Top End Gasket Kit, Clutch Cover Gasket, & Center Case Gasket
  • Mikuni VM26 Carb Kit for proven performance, ported manifold, gaskets, hardware, and throttle cable
  • No case boring
  • We stock all the replacement parts for this kit, no ridiculous wait times or prices for these High Performance spares.
Installation Note: Stroker crank requires use of the 12v piston and high Volume Oil pump w/shaft. Vm26 requires use of a throttle like part number TBW1051. CT70’s require TBW0133 dual feed petcock for the 2 fuel tank lines.
Note: Only for use with 4 speed CT70H, SL70, and XL70. Also for 81 & up ATC70 and 3 speed 80-81 CT70

Kit Contents by Part Number:
TBW0713, TBW0365, TBW0225, TBW0287, TBW0334, TBW0206, TBW0316, TBW0301, TBW0399, TBW0521, TBW0385, TBW0251, TBW0300, TBW0156, TBW0861