Sound not good.. But performance very good compare to other standard cutting performance pipe.

Standard also can use see how u set the carbs only.

Saya Pakai ini pipe (In red circle) Pipe tak da jenama sebab tak suka pakai barang berjenama nanti kena curi habis... LOL!
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I am driving Mazda3 these days, company car.

Long distance need to improve mid-range torque. Select a suitable exhaust pipe for that.

Use a less restrictive filter like K&N cap burung or other cheap car air filter which you can DIY. Than retune carbs, Change sprocket combinations, BRT CDI + standard cutting muffler (Not too big manifold but larger outlets). And finally find a race cam which slightly higher profiles (FZ150 cam or a cam that is not more than 5.2mm lift). This mod is for standard bike only.

CJ Ipoh standard cutting. Than carburetor kasi rejet dan setting sikit. And filter kertas tu kasi buka atau pakai yang sponge macam K&N drop in filter atau DIY Bubuh sponge HKS kereta. Last baru tukar spocket belakang kecil sikit.

At least put at 60mm racing block. But it will be better if u can get a RXZ carbs or a NSR carbs. Find cheap cheap secondhand as long as the conditions is good.