Post by zul_cbr on Apr 12, 2009 8:11:44 GMT 8
Aprilia RS250 SACHS SHOCK MOD
WHICH SHOCK?
Aprillia RS250 rear shock
Try to get one with an adjustable ride height. Find one no later than 1998-99. Not sure myself, since I picked one up from an RS250 Cup bike.
From what I've been told, all the Cup bikes came with adjustable ride height.
Here's the earlier model RS250 shock.
This one does not have a ride height adjuster and is better made and easier to rebuild than the later model.
FITTING?
Grind 1.5mm on each side of the NC30's triangle linkage where the bottom of the shock mounts since the RS's mounting linkage is narrower than the NC30s. If you have the earlier model RS shock, the top of shock needs to be shaved a bit to clear the frame.
This is what it will look like after you mod the linkage.
SPRING?
A stock RS250 spring is 325lbs. A stock NC30 is little more than double the RS spring; hence, you will need to ditch the RS’s spring. You can easily get the spring off the RS shock, but you'll need spring compressors to take the spring off the NC shock. You could also buy a new spring to suit your weight. Those who change out their spring go heavier like 850-900lbs. I always thought the stock NC30 shock was undersprung.... or maybe I am oversprung
I went with a 900lbs Ohlins spring and had the unit rebuilt and revalved.
RECHARGE?
Before you recharge, you should test fit the unit on your bike! First release the current charge by depressing the valve located on the remote reservoir (similar to a tire valve) till all the pressure is released.
Now crack the lines open just a bit so you can re-adjust them similar to how the original stock shock was mounted with the reservoir (granted your NC30 came with the remote). Do this before you recharge the shock to 180PSI!
DIRECTIONS for adjusting the ride height type shock.
Seems like the optimal height adjustment is 8mm.
Once completed it will look something like this.
*** taken from hondarvf.com
>> is possible to fit our bikes? as i know, some Honda parts are interchangeable. so, i assume this mod also can be applied to NC23/NC29 although its using Aprilia RS250 shock. if not, just an info laa.. ;D
WHICH SHOCK?
Aprillia RS250 rear shock
Try to get one with an adjustable ride height. Find one no later than 1998-99. Not sure myself, since I picked one up from an RS250 Cup bike.
From what I've been told, all the Cup bikes came with adjustable ride height.
Here's the earlier model RS250 shock.
This one does not have a ride height adjuster and is better made and easier to rebuild than the later model.
FITTING?
Grind 1.5mm on each side of the NC30's triangle linkage where the bottom of the shock mounts since the RS's mounting linkage is narrower than the NC30s. If you have the earlier model RS shock, the top of shock needs to be shaved a bit to clear the frame.
This is what it will look like after you mod the linkage.
SPRING?
A stock RS250 spring is 325lbs. A stock NC30 is little more than double the RS spring; hence, you will need to ditch the RS’s spring. You can easily get the spring off the RS shock, but you'll need spring compressors to take the spring off the NC shock. You could also buy a new spring to suit your weight. Those who change out their spring go heavier like 850-900lbs. I always thought the stock NC30 shock was undersprung.... or maybe I am oversprung
I went with a 900lbs Ohlins spring and had the unit rebuilt and revalved.
RECHARGE?
Before you recharge, you should test fit the unit on your bike! First release the current charge by depressing the valve located on the remote reservoir (similar to a tire valve) till all the pressure is released.
Now crack the lines open just a bit so you can re-adjust them similar to how the original stock shock was mounted with the reservoir (granted your NC30 came with the remote). Do this before you recharge the shock to 180PSI!
DIRECTIONS for adjusting the ride height type shock.
Seems like the optimal height adjustment is 8mm.
Once completed it will look something like this.
*** taken from hondarvf.com
>> is possible to fit our bikes? as i know, some Honda parts are interchangeable. so, i assume this mod also can be applied to NC23/NC29 although its using Aprilia RS250 shock. if not, just an info laa.. ;D
