[CT125] 428 to 420 conversion set (RK gold seal chain)

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

The effect of downsizing the 428 → 420 chain is smoother acceleration and deceleration due to lighter weight. Accelerates better and brakes work better. It also reduces resistance and improves fuel efficiency. Of course, the maximum speed is also higher, the maintenance cycle is longer due to the seal chain, and the seal type 420 has a longer adjustment span than the non-seal 428.

Set sprockets together, front and rear

Seal chain gold RK 420 KLO -120 (clip type)
The number of chain links is 120, so a CUT is required.
(CT125 has 108 chain links)

Sprocket 420-14 SCORPION
Sprocket 420-39
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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