Yamaha YZ250(W)/W1 Owner's Service Manual page 584

SETTING
9Extent of adjustment (spring length)
[Titanium spring]
SPRING FREE
LENGTH
Approx. 265mm
(10.43 in)
[Steel spring]
SPRING FREE
LENGTH
260mm (10.24in)
275mm (10.83in)
7-20
TUN
EXTENT OF
b
ADJUSTMENT
One I.D. mark
245.5~263.5 mm
(9.67~10.37 in)
Two I.D. marks
251.5~269.5 mm
(9.90~10.61 in)
Three I.D. marks
243.0~261.0 mm
(9.57~10.28 in)
EXTENT OF
b
ADJUSTMENT
240.5~258.5mm
(9.47~10.18in)
255.5~273.5mm
(10.06~10.77in)