I have a K7 650 and have added GIVI trunk and side cases and have the rear spring maxed out on the preload adjustment and it's not too bad with just me on it but it needs a boost. When riding 2-up it looks like the fender is about touching the tire, I weigh 230 and wife 155 and it's too much. I'll probably install Sonic springs in front this winter and change fork oil but the shock needs another spring, Race Tech has a calculator that says I need a 15.125 KG/MM spring for just me, no telling what when going 2-up. This sounds like a lot since stock is 8.2, this is nearly double that. I can't afford a shock rebuild/revalve right now but don't want to over-spring the shock and have it too bouncy with too much spring and not enough rebound. The bike only has 9000 miles so it's still like new. I would like it to be the correct ride height with no preload and allow me to crank it up when I need to. Any suggestions? What rate spring has other used? What weight fork oil and how much with new springs? Thanks.