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Trail Bikes 117cc Stroker Crank Kit 4 - Z50 (88-99), XR50  CRF50  XR70  CRF70

Trail Bikes 117cc Conversion Stroker Kit 4
Honda Z50 (1988-99)
Honda XR50, CRF50,
Honda XR70, CRF70
Pricing: $263.95


Trail Bikes Mini Bike 117cc Stroker Kit
(Requires combination with Race Head Kit, Sold Separately)

      •Honda Z50 1988-1999
      •Honda XR50 All Years
      •Honda CRF50 All Years
      •Honda XR70 All Years
      •Honda CRF70 All Years

This is an affordable kit that will convert your TB 88cc Race Head kit into a powerful open class 117cc engine with tons of torque!

The kit includes the following parts:

     - 51mm Crankshaft with NTN bearings
     - Lightweight 54mm aluminum cylinder with steel sleeve, cast in mounts for skid plates, and larger cooling fins.
     - High compression piston with rings, pin, & clips
     - Crankcase and clutch cover gaskets
     - Head gasket kit

As with all 117cc kits on the market, installation requires an engine disassemble 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, you will need to have a Clymer or Honda shop manual. Instructions do not come with the kits but the installation of the crankshaft is just like installing a stock Honda crankshaft and both manuals cover this.

Consider the following additions:
     - High volume oil pump - Part# TBW0226
     - Side Head Cover
     - Oil Cooler - Part# TBW9073
     - CR8HSA spark plug (not required, but recommended)

Recommendations for better performance and endurance:
If using the stock Honda clutch, upgrade to the Manual Clutch Kit with the Billet clutch housing.
If already using a manual clutch kit with the cast housing, take the next step and upgrade the housing billet housing.
The stock housing in both the Honda clutch and the TB regular manual clutch kit is not made for this type of power and may fail due to the extra fatigue.
Also, do not tighten the clutch nut with a hammer and screw driver - it must be torqued on!

Parts Included:



  • TBW0974
  • TBW0974
  • Trail Bikes
  • New

Shipping Information

  • Item Requires Shipping
  • 6.0 lbs.

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