ESG091 is a high quality stator that is a plug in replacement for the OEM stator in your XV535 Virago. ElectroSport manufactures the ESG091 stator using very high quality materials for the stator core, using superior insulation coatings, and only using the very best copper wire that has the highest possible temperature rating. This stator will outperform and outlast the OEM stator. Output is slightly higher than stock especially at lower RPMs, and the OEM regulator will handle this power fine as long as it is in good working order. Like all stators manufactured by ElectroSport this ESG091 also comes with a full one year warranty.