i ride 250 blade from bkt raja tol to duta tol 160 all the way, the engine feel like tercabut...then coming back time, maintain around 130 i would say it's safe....but if u wana take 160, oso can, make sure it's not ur bike...ahahaha..in this case, it's not my bike .belasah 160 lar.. ahahaha

i think blade or er6 bike sounds not so nice even u change exhaust lar..dont waste money...er6 sounds like vn500 ...ahahaha...i saw 1 new ninja250 change the exhaust under the seat...maybe you should do tat...but i still think the old zx2 sounds better esp. if u stuff more cotton inside...