Malossi 166cc Big Bore Cylinder Kit for 125cc – 150cc 2-Stroke Genuine Stella and Vespa ScootersCOMPATIBILITY: Genuine – Stella 125 2T, Stella 150 2TVespa – PX Series (VLX, VNX, VSX)Has slightly less displacement than the other kits in its class, but don’t hold that against it. This cast iron kit gives loads of high RPMs, with out sacrificing much mid and low-range power. Comes with a cylinder head and the following carb jets:115 main jetBE4 atomizer52/140 idle jetA Prima pipe is perfect for bringing out the power this kit can generate. Another popular upgrade is a 26/26 carb.***PLEASE NOTE***Performance upgrades are considered racing parts and are not covered by warranty. There are too many variables involved with user-installed parts, and pushing the limits of your engine tends to wear parts faster. Use at your own risk!This performance cylinder kit was designed to allow the best cooling characteristics possible. In order to do so, the manufacturer has created a specific layout of t