Kit complete chain reinforced FRANCE EQUIPEMENT size original so no 428, with ring number of teeth with the choices (from 48 to 52 teeth), sprocket 12, 13, 14, 15 and 16 teeth with the choices. Ideal for again has nine on your 125cc Derbi, 5 versions to choose from:
-Strengthens: With RK chain 428 HZ STANDARD Reinforced
-Ultra reinforced: With RK chain MXZ 428 ultra-reinforced
-Strengthens O'ring: RK428KRO with self-lubricated chain with seals o'ring for less netretient and strengthened.
-Super reinforced RX'RING: With RK chain 428 XSO HYPER Reinforced X-ring, so with seal holding the lubrication! Top notch!
-Ultra reinforced XW'RING: With RK 428 GXW chain Ultra Enhanced X-ring, so with seal holding the lubrication! The best chain market, extremely long life!
The pinion and the crown are cut from the best materials for quality and optimum life! Note that original, the Derbi 125cc bikes are équippées a fairly low range channel kit (same ultra reinforced single here)! You will choose a bigger sprocket or a smaller crown for more top speed, and a smaller gear for more acceleration! Attention kit longest chain is more difficult to tier, so plan at least one exhaust system and a sports air filter to pull a tooth or two gear and more. A tooth pinion area equivalent to 5 teeth crown!
example:
If your speed 14X52 teeth is 100 KM / H 8000 rpm
It will be: 104km / H 14X50 teeth 8000 rpm
It will be: 107,14KM / H 15X52 teeth 8000 rpm
It will be: 111,43KM / H 15X50 teeth 8000 rpm
....
Originally, the bikes Derbi GPR 125 4T are fitted with teeth 14X49 teeth!
Itself on:
Derbi GPR GPR NUDE, GPR 125 RACING 2009 today has 4T engine.
