If you are looking to replace your crank or make your 180cc a 188cc this is the ticket. This has 3mm more stroke then the stock crankshaft.
Engine fitment for GY6 QMJ157.
Honda Ruckus GET Plug & Play EVI Performance CDI/Coil Combo
GY6 or GET Dip Stick Breather
GY6 OKO / PWK Complete Performance Carburetor
NGK Honda Ruckus / Metropolitan iridium spark plug 49cc/50cc