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+--- Thread: Standard Spring Rate on Gen 1 Forks?? (/showthread.php?tid=58109)
Standard Spring Rate on Gen 1 Forks?? - Capt - 03-04-12
I know its been covered before, this damn IPAD is no good for my aging eyes.
Anyone tell what they were as standard PLS?
Ta!
Re: Standard Spring Rate on Gen 1 Forks?? - dekker555 - 03-04-12
They don't have a single rating as they are dual rate. I've just changed mine (front and rear) for single rate springs to suit my weight (forks serviced and rear damper re-gassed too) and it's made a considerable improvement to an 8,000 m. gen 1.
Re: Standard Spring Rate on Gen 1 Forks?? - Falcon 269 - 04-04-12
From the Yamaha Workshop Manual:
Spring rate (K1) 8.1 N/mm (0.83 kg/mm)
Spring rate (K2) 11.8 N/mm (1.2 kg/mm)
Spring stroke (K1) 0 to 55 mm
Spring stroke (K2) 55 to140 mm
Total fork travel is 140mm.
Essentially, stock dual-rate springs are too soft in the first part of their travel but too stiff in the latter part.
Re: Standard Spring Rate on Gen 1 Forks?? - seangee - 04-04-12
Changed mine for linear rate springs and the difference is amazing. Did nothing else to the forks other than change the oil (and of course back off the preload which I had maxxed out) and its more than good enough for normal road use.