Valkyries have a lot of "dive", when you let off or hit the brakes.
Progressive (brand) springs fix this pretty much 100 percent.
I'm guessing this is what you are describing...
http://www.amazon.com/Progressive-Suspension-11-1513-12-5-Spring/dp/B000UK3Q4W/ref=au_as_r?ie=UTF8&Make=Honda|59&Model=GL1500CT%20Valkyrie%20Tour|17895&Year=1997|1997&carId=001&n=15684181&newCar=1&s=automotive&vehicleType=motorcycle
The above URL will work if you cut and paste it into your browser location bar, there's so many funny characters in
it it confuses the automatic formatting on the board...
-Mike