I wonder what my 600 SX was going on radar when the speedo said 180km/h. I also had an M-10 with 1.25" six pitch predator with PI end dumps and typically saw anywhere between 170 - 180 on a super smooth road. Always wondered what I was actually doing. Seems you got it pretty good if it was +4!
As far as the M-10 goes, it's a great riding skid. I knew it made a difference installing it, but wasn't sure how much better it actually was until i got my SRX and started riding the Pro-Action again. I'm seriously wondering whether to install the M-10 in the SRX or not, I want weight transfer, I want top speed, but I dont want to be beat up in the whoops, the M-10 only satisfies 1 of those areas but its hard to turn down. I have the M-10 with the base package shocks.
Installing the skid isn't hard at all really, they make it very easy with the template and the install instructions here on the site also. Reading the manual can get confusing until you look on the tech pages and see a picture. Overall I think it took me about 8 hours total to install myself with a little help from dad (mostly his tools lol). The only downside is if you ever decide to part with the sled you're putting it in (my case), you have all sorts of rivets to drill out, support plates to remove, and support plates to replace that you had to either remove or ruin to get everything to sit nicely and then you're left with a tunnel that looks like a screen door. I guess it makes for good weight savings!
words.LOLWill look into it.I know a guy in Ontario who has some suspensions to sell,will check it out.