2007 Yamaha Apex Factory Service Manual, Page 80Get this manual
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GEAR SELECTION 6 Primary spring
Preload (kg) 294 (30) 343 (35) 392 (40) 294 (30) 294 (30) 343 (35) 343 (35) 392 (40) 392 (40) 441 (45) 441 (45) 343 (35) 294 (30) 294 (30) 294 (30) 343 (35) 392 (