NK Racing CT125 428 to 420 conversion set (RK gold seal chain & FR sprocket) (excluding tax and shipping included)

428 to 420 conversion set
The 428 size is over spec with an engine capacity of 125cc.
Super Cub C125, GROM, Wave125, etc., which have the same engine as CT125 but have even higher output, are 420 size.

The effect of downsizing from 428 to 420 chain is smoother acceleration and deceleration due to lighter weight. The acceleration will be better and the brakes will also be more effective. Fuel efficiency also improves because resistance is reduced. Of course, the maximum speed increases, and the use of a sealed chain lengthens the maintenance cycle, and the adjustment span is longer with the sealed type 420 than with the non-sealed 428.

Set the sprocket, front and rear, together.

seal chain goldRK 420 KLO -120 (clip type)
Since the number of chain links is 120, CUT is required.
(The number of chain links in CT125 is 108)

Sprocket 420-14 OSAKI
Sprocket 420-39

he 428 size is over spec for 125cc engine capacity.
The Super Cub C125, GROM, Wave125, etc., which have the same engine as the CT125 but even higher output, are 420 size.

The effect of downsizing from a 428 to a 420 chain is smoother acceleration and deceleration due to weight reduction. Acceleration is better and braking is more effective. Fuel consumption is also improved due to reduced drag. Of course, the maximum speed is also increased, and the maintenance cycle is lengthened by using a sealed chain.

Sprockets, front and rear, are set to match.

Seal chain gold RK 420 KLO -120 (clip type)
CUT is necessary because the number of chain links is 120.
(CT125 has 108 chain links)

Sprocket 420-14 SCORPION
Sprocket 420-39