Open variator sleeve from Naraku can replace the restricted (with a collar) item in the original variator, giving the engine a significant increase in top end speed and acceleration. The sleeve is surface-hardened and ground, guaranteeing long service life. Due to direct importing from the manufacturer, we can offer this item at a very low cost. Same quality as the original, just not packaged as such. (We warn against cheaply made replicas from Germany that often cost less. The resulting damage could be far more expensive!) Only for use in the original variator! Tuning variators such as from Top Racing contain a suitable sleeve. Suitable for all upright Kymco and SYM engines.