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Trail Bikes 108cc Big Bore Kit + Roller Rocker V2 Race Head + Stroker Crank - Z50 / XR50  CRF50  XR70  CRF70  CT70

Trail Bikes V2 Race Head, 108cc Big Bore kit
with stroker crank makes a 50cc a 108cc
Z50 88-99; All Years XR50, CRF50, XR70, CRF70; CT70 91-94 Various 12 volt engines
Pricing: $719.95


Trail Bikes - 108cc 52mm Big Bore kit, V2 Race Head with stroker crank
(makes a 50cc into a whopping 108cc!!)

Honda 1988-199 z50
Honda XR50, CRF50,
Honda XR70, CRF70
Honda CT70 (1991-1994 ONLY),
Other Various 12 Volt Engines

Includes the following:
     - New V2 Roller Rocker Race Head
     - 28.5mm intake Valve
     - 23.5mm Exhaust Valve
     - 5mm Valve Stem
     - 26mm Intake Port - Matches Intake Manifold Kit 0433
     - 23mm Exhaust port
     - High Performance Race Camshaft (For V2 Head)
     - 51mm Crankshaft with NTN bearings
     - Lightweight aluminum cylinder with steel sleeve
     - Cast in mounts on cylinder for aftermarket skid plates
     - Oversized cooling fins on cylinder for efficient heat dissipation
     - High compression 52mm piston with rings, pin and clips
     - 52mm Top End Gasket Set
     - All pistons in the V2 kits are new with CNC machined piston domes
     - Head kit includes all hardware
     - Head kit Includes all covers

Please Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal) Make sure to order a high output oil pump part #TBW0226.


  • K9109TB
  • K9109TB
  • Trail Bikes
  • New


Shipping Information

  • Item Requires Shipping
  • 10.0 lbs.

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