NCY High Performance Stage 2 Power Pack (Horizontal) for 50cc 2-Stroke Yamaha ScootersINCLUDES: Performance NCY ExhaustNCY Cylinder KitPrima 6mm Dellorto Jet KitNCY Exhaust GasketUltralight gold specially coated overdrive variator Ultralight outer drive face Ultralight large shoe racing clutch Ulltraight drilled & vented clutch bell Dual range secondary slider 15×12 7g roller weights 1500 Compression spring Ball bearing compression spring seatCOMPATIBILITY: Aprilia – Amico 50 2T, SR Mod. 1993 50 2TMBK – Booster 50 2T, Stunt 50 2TYamaha – Zuma 50 2TReady to take your Zuma 50 2-stroke to the next level? This is the Stage 2 performance kit that will take your Zuma performance up a serious notch over our Stage 1 Kit. Save $$ by purchasing this entire kit.This exhaust has a race-tuned expansion chamber to help your engine make maximum power in the range of 7000-12000 RPM. The included variator parts are necessary modifications to help your engine rev that high and take advantage of the powe