LeoVince TT system for 50cc standard cylinders and 70cc sports cylinders. Welding on the chamber is not as good quality-wise as on the ZX, meaning this system has similar performance quality, but a cheaper feel. Good torque band and solid performance increase you can feel from 4000rpm up. Good value for money and includes all fixings. Almost all TT systems have an E-certificate and with a 10% performance gain, are still road legal. Removing the restrictor plate will increase performance, but invalidate the Vehicle Type Approval. If derestricted, the main jet must be changed. Supplied with E-certificate.