Engine Cases (Pair, Long, Big Bore, Custom); GY6 4-pin Tech tip: For maximum no-slip

Tech tip: For maximum no-slip performance

154FMI Brand Series Tao Tao

Standard seat for VNX or VSX

and Vespa scooters fitted with the Piaggio 4T 49cc engine

Length:  16

Engine Cases (Pair, Long, Big Bore, Custom); GY6 4-pin Tech tip: For maximum no-slipScooterworks offers our exclusive pair of Custom Big Bore Engine Cases for GY6 long engines. We machine these in matched pairs ourselves, and we bore them up to 63mm, big enough to fit a 63mm performance cylinder kit. Go big! Pick up a new crankcase gasket while you're at it. Specifications: Matched right and left sides Stamped serial numbers ensure you have a matched set Dimensions: 10"L x 10"W x 4"H Compatibility: 157QMJ based 125cc 150cc 169cc