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Bikes, Hints'n'Tips => Fazer 1000/FZ1 corner => Topic started by: Capt on 03 April 2012, 09:59:27 pm

Title: Standard Spring Rate on Gen 1 Forks??
Post by: Capt on 03 April 2012, 09:59:27 pm

 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!

Title: Re: Standard Spring Rate on Gen 1 Forks??
Post by: dekker555 on 03 April 2012, 10:52:50 pm

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.

Title: Re: Standard Spring Rate on Gen 1 Forks??
Post by: Falcon 269 on 04 April 2012, 06:32:55 am

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. 

Title: Re: Standard Spring Rate on Gen 1 Forks??
Post by: seangee on 04 April 2012, 09:57:10 am

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.