Need stiffer shocks

You can find stiffer spring rates where they sell race car suspension parts. The only issue is that they usually are 8" long and Our bikes come with a 9" spring so you will need to fabricate a 1" spacer. This is for the rear shocks of course.
 
Progressive 444's and Progressive fork springs. Economical sound and vast improvement over stock.
 
Agree with sonny .My wife and I are a bit on the larger size got the 444's w/heavy duty springs vast improvement over stock.
 
Also agree with Sonny, skip the cheaper offerings, skip straight to 444 or better shocks.