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It is like a middle ground between OEM and KOSO.
However, the RPMs were a little too high for city driving and it was too busy and bothersome, and the vehicle speed was not increasing well over 100 km. I replaced the center spring with the AdvancedPRO's Center spring.
OEM had 5 rolls and 142mm free length, KOSO had 5 rolls and 133mm free length, and AdvancedPRO had 3 rolls and 108mm free length.:Set pressure was the same for OEM and AdvancedPRO, and KOSO was about 10% higher.:Based on Set pressure and free length, I would guess that OEM, KOSO, and AdvancedPRO are higher, in that order.
In addition to the center spring, we also changed to a KOSO Sports Clutch, increased the weight roller from 16g to 18g, and increased the pulley boss +0.5mm (back to the same length as the OEM). The result is that the gear shift rpm is 1000 rpm higher than OEM and 500 rpm lower than KOSO at 7000 rpm.
The busyness in town driving is no longer a concern, the result of the acceleration test is the same as before the change, and the increase in vehicle speed after 100 km has also improved. However, I feel that re-acceleration from Axel OFF was more powerful before the conversion.
Unless you want to focus on acceleration to the extreme, this center spring is a good choice.
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Fits: HONDA PCX160, HONDA PCX150, HONDA PCX125
Quality, durability no problem!
I use it on my PCX.
Even if I use 10,000km of 14g and 15g half and half, there is no problem, and I think the quality and cosmetics are high.
With so many Grams to choose from, I can recommend it for Custom and everyday use!
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