Here's some random thoughts;
Have you ever put a zip ty on the fork tube to see how much compression you're getting? We do that on dirt bikes sometimes if we're not sure exactly whats's going on.
Here's a link to a good article about springs http://dirtbike.off-road.com/dirtbike/article/articleDetail.jsp?id=332656 A lot of people don't understand preload vs. spring rate. The article kinda explains that. On a fork spring you can pretty much rate them with a bathroom scale and a tape measure if you want to experiment with the other springs you have. The formula for rate is in there too if you need to cut some down.
Normally if you increase spring rate you have to slow rebound down because like JB said the springs are what returns the forks. All else being equal stiffer spring = faster rebound.
I'd shy away from using valve springs or any other spring as a preload spacer unless you know exactly what you're doing. On a dirt late model thats called a double stack. The other night the driver of the car I work on did this without consulting me first. He put a 400 on a 250 to stiffen it just a little(he thought). Well the formula for this is (a*b)/(a+b)=spring rate. In my example he made a 153 lb spring. What you typically end up with is a soft spring with a ton of stored energy that unloads like a MF given the chance. Might be useful if you want to wheely easier.
04 KDX 200
05 KX 250f- SOLD!
01 GSXR 750
75 GT 550
68 Chevelle
Wanted: 86 FZ600 w/OEM paint
Have you ever put a zip ty on the fork tube to see how much compression you're getting? We do that on dirt bikes sometimes if we're not sure exactly whats's going on.
Here's a link to a good article about springs http://dirtbike.off-road.com/dirtbike/article/articleDetail.jsp?id=332656 A lot of people don't understand preload vs. spring rate. The article kinda explains that. On a fork spring you can pretty much rate them with a bathroom scale and a tape measure if you want to experiment with the other springs you have. The formula for rate is in there too if you need to cut some down.
Normally if you increase spring rate you have to slow rebound down because like JB said the springs are what returns the forks. All else being equal stiffer spring = faster rebound.
I'd shy away from using valve springs or any other spring as a preload spacer unless you know exactly what you're doing. On a dirt late model thats called a double stack. The other night the driver of the car I work on did this without consulting me first. He put a 400 on a 250 to stiffen it just a little(he thought). Well the formula for this is (a*b)/(a+b)=spring rate. In my example he made a 153 lb spring. What you typically end up with is a soft spring with a ton of stored energy that unloads like a MF given the chance. Might be useful if you want to wheely easier.
04 KDX 200
05 KX 250f- SOLD!
01 GSXR 750
75 GT 550
68 Chevelle
Wanted: 86 FZ600 w/OEM paint
