If you type in “Tuning CG125” into the internet you get many opinions and ‘advice’ on how to make your CG or Chinese derivative go faster. Most of them are wrong. The CG design just has one cam which works on both inlet and exhaust alternately, so if you changed the cam profile it affects both valves and that’s not what you want. You can modify the ports but if you don’t know what shape they need to be, then it’s guesswork. The easiest way to get more poke is to increase the capacity. What Colin has done with his 190cc kit is just that. The kit includes everything needed apart from the larger crankcase mouth. This is best done by a machine shop, local engineering shop or someone who can do rebores. You can do it yourself, with care, and a Dremel. But go slowly. Because of the camshaft and porting as covered above you can’t increase the maximum revs, but you can increase the torque of your engine. Torque is what gives acceleration, not outright power. So you’re left with the option of raising the gearing to get a little more speed in top gear or by leaving it as it is and getting more acceleration through the revs. I prefer this option. Especially if you’re a bit on the large size. You may have to raise the carb. needle a notch, you may have to change the jetting, but if you copy the jetting of the Honda XL185 you’ll be close. Don’t waste time messing with aftermarket air filters, most are useless. Stick to what Mr Honda put there. Have fun.Read full review
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Excellently made to an exact tolerance. My bike now starts first off and runs beautifully. Highly recommended.
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its very good for the money.
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Verified purchase: Yes | Condition: New
Five stars
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