Suspension Spring Rate Chart for Yamaha R3 / MT-03

*Keep in mind, these are only general recommendations for spring rates to get you close for your weight. Optimum spring rate is affected by countless variables including riding style, preference, pace, track layout and surface finish, and bike geometry and suspension setup.  Generally faster racers will prefer springs at the stiffer end of their range. OEM Fork Springs for Yamaha R3 2015-2018 are .66 kg, OEM Shock spring is 900 lb. OEM Fork Springs for Yamaha R3 / MT-03 2019- are .80 kb, OEM Shock spring is 900 lb.

Yamaha R3 / MT-03 (all years)
Rider Weight (not including riding gear)	Fork Spring Rate	Shock Spring Rate
<120	.66 kg (stock springs)	900 lb (155N)
110-140	.70 kg (7.0N)	900 lb (155N)
120-150	.725 kg (7.25N)	1000 lb (170N)
130-160	.75 kg (7.5N)	1000 lb (170N)
140-170	.775 kg (7.75N)	1050-1100 lb (185N)
155-185	.80 kg (8.0N)	1050-1100 lb (185N)
175-205	.825 kg (8.25N)	1150 lb (200N)
190-220	.85 kg (8.5N)	1150 lb (200N)
210-240	.875 kg (8.75N)	1200 lb (215N)
225-255	.90 kg (9.0N)	1200 lb (215N)
235-275	.925 kg (9.25N)	1200 lb (215N)
250-280	.95 kg (9.5N)	1200 lb (215N)
270-300	.975 kg (9.75N)	1250 lb
>290	1.0 kg (10.0N)	1250 lb