Race Tech Springs and Emulators

[FinalImpact]

i have an s2 fz-n ive done the hyperpro fork spring mod and supplied 15wt oil and for track days there great i can really load the front,however on normal road riding at lower speeds the front feels a little hard,the bike reacts over small bumps instead of absorbing them, i would like it a little softer but dont know if i should shorten the preload tubes or use a lighter oil say a 10wt

I'd guess you're headed in the right direction by draining the 15wt in favor of 10wt. Think of it this way; the spring dictates how much load you can carry so check the sag and ride height.
The dampening controls what you feel. You only have control over compression dampening so if the ride height is good, you can reduce the harshness by lowering the oils viscosity.

Also keep in mind that you can mix weights if you feel there is a need (10wt & 15wt for example).

How much travel are you using as the norm on a street ride keeping in mind that if the dampening is to great the suspension won't collapse so it CAN BE misleading. Dampening takes time and small bumps may be transmitted to you instead of being absorbed if the dampening is too aggressive. Does that make sense?

 

[sparkycrew]

had a word with a bike tech and hes having the same issue on his suzuki drz enduro,he said the same about the oil weight,just to add to the mix i have progressive fork springs and the oil weight will never be correct all through the spring travel as the rate changes,thats why it feels great when ridden hard,so i figure, and iam glad youve backed me up a bit, trial and error with oil weight is needed,as a side note i rode my brothers r1 with maxton valved forks and an ohlins rear shock and the ride was solid but compliant very impressive,