Product Information

15 x 37 Final Gear set (more top speed)

replace the original  13 x 40 

this give you more top speed for the same rpm and with a reasonable loss of power (unlike the   17x36 or 18x36  where you need a really powerfull improved motor)

but it's better to use it with a a10 camshaft and a 1500 contra spring, to reduce the loss of stroke power 
  even if it's a better use to put it on a 150cc or bigger, you can use it on a 125cc for a good result (in this case, choose the 15x37 and not the 16x37)

gear ration 2,47 , original final gear set 3,08, smaller is the gear ratio, higher is the POTENTIAL top speed 

125cc and  150cc +

for chinese scooter, gy6, 152QMI, 125cc, and 153QMI, 157QMJ,   150CC, motors,  Peugeot sum up, Revatto, jonway, Roadsign, Aztral, kinroad, Yiying, baotian, znen, Gowinn, jmstar meiduo, haizhimeng, wangye, Jialing, vonroad, Hanglong, Jincheng, Zongshen, Linhai, Benzhou, Dazon, Huibang, Zhonghyu, Shenke, Wacox, etc...

all the tutorials and informations on  http://www.scooterchinois.fr/modules/newbb/viewforum.php?forum=98

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Price: €36.84ttc

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