YSS SUSPENSION Progressive fork spring 743.08.91

YSS Progressive Wire fork springs with a firmer design than stock.

YSS fork springs are made of high quality silicon spring steel. This allows the thickness of the wire to be reduced, which makes the spring more active and thinner, but at the same time effectively prevents twisting of the spring.

To minimize noise and improve oil flow in the fork, the springs are fully polished and ground on the top and bottom.

The scope of delivery includes 2 springs for a complete conversion of the fork.
SPRING TYPE: PROGRESSIVE
LENGTH: 305MM
DIAMETER 1: 36.5MM
HARDNESS 1: 9.0 N/MM
HARDNESS 2: 12.0 N/MM
LEFT AIR CHAMBER: 150 MM
RIGHT AIR CHAMBER: 100 MM
RECOMMENDED VISCOSITY: 10W


APPLICATIONS OF THIS PRODUCT:
According to the data provided by the manufacturer, this article is compatible with the following brands, models and years:
Yamaha Tracer 900 850 MT09TRA ABS 115 CV, 85 kw 3cil. RN438 2SCL Bastidores: RN438 henceforth00301-- 2017
Yamaha Tracer 900 850 MTT850 ABS 115 CV, 85 kw 3cil. RN571 B5C1 Bastidores: RN571 henceforth00301-- 2018
Yamaha Tracer 900 850 MTT850 ABS 115 CV, 85 kw 3cil. RN571 B5C9 Bastidores: RN571 henceforth06902-- 2019
Yamaha Tracer 900 850 MTT850 ABS 115 CV, 85 kw 3cil. RN571 B5CF Bastidores: RN571 henceforth10443-- 2020