Different Gear Ratios for 05" Hijet Auto

So I’m trying to figure out if there’s different gear ratios for my Automatic hijet that will allow it to have lower RPM at the top end. I’m trying to use it as my daily being able to do 80kmh for about 40mins. Its basically at redline doing so now and my mechanic says we can solve the issue if there’s a different gearing we can use. I was wondering if anyone here knows of any solutions to my problem? Thanks!

Assuming you’re either in Asia or in Oceania where yours is Kei-engined (660 cc), yours having low final gearing to compensate, you could theretically increase top speed, through either replacing your ring and pinion with that of exported to Europe Hijets or domestic to Europe Piaggio Porters which are nothing other than Hijets assembled under license in Italy. Here’s a set of what I find to be quite overpriced: Piaggio Porter Differential Gear Kit 0441387Z01000 | Piaggio P Of course, you could get the entire axle from a breaker yard for way under half of what they’re asking

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