Here are some specs I've found, I own a GTV Levin with it's original 1st gen Blue top and I think it's great. I used to own a 93' pulsar 1.6 and it just doesn't compare! 4age has great response and TVIS works well, it has good torque from the bottom up of the rpm range, the engine revs to 7700rpm and it's just screaming at that point. Have a look at club4age they have an engine comparison between all the 4age's! hope this helps