Trail Bikes 108cc Stroker Kit 3 with Race Head for CRF50

TB Parts

$569.99 $569.99
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This kit is the complete kit to convert your stock motor into a powerful open class 108cc engine (much more powerful than the common Chinese 107 and 125cc engines). Also - this crank was made specifically for the newer engines and thus - you will not have any fitment issues like trimming the piston skirts in order to clear the crank or the piston not lining up with the cylinder deck.

  • 51mm Crankshaft with NTN bearings
  • High compression piston with rings, pin, & clips
  • Race Head with Large 25/22mm valves and porting for increased performance and big cooling fins.
  • High compression piston with rings, pin, & clips
  • Lightweight aluminum cylinder with steel sleeve, cast in mounts for skid plates, and large cooling fins.
  • High performance race camshaft 
  • 26mm MIKUNI Carburetor kit with intake, air filter, and throttle cable. 
  • Crankcase and clutch cover gaskets
  • Head gasket kit

Exceeds OEM Standard equipment


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

Note:  This kit should be installed by a professional mechanic.

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