TB Parts 51mm Stroker Crankshaft for the 6 volt engines, turns engines with the TB 88cc kits into 108cc.
To suit all 4 speed CT70H/SL70/XL70, 80-81 3 speed CT70 and 81-85 ATC70.
Must use the 12 volt new style pistons and High Volume oil pump with the crank (for clearance)
Crank spigot measures 63.5mm from the cam drive sprocket to the end of the threads.
For the Aussie Z50JZ and Z50R 6v models.
Product Code: TBW0713