Upgrade to enjoy this feature!
Vital MX fantasy is free to play, but Premium users receive great benefits. Premium benefits include:
- View and download rider stats
- Pick trends
- Create a private league
- And more!
Only $10 for all 2026 SX, MX, and SMX series.
The Shop
Luxon 4-Post Bar Mounts
$189.95 - $239.95
Free shipping: VITALMX
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
With the stock rear spring I was getting 97mm rider, and 57mm static. I still had my 4.8 kg spring from my 16, threw that in even though it was a bit long, and was getting 104 rider and 47 static.
Found that this rate was discontinued through racetech, and was wondering what you guys thought of those numbers, and possibly of a supplier for that rate of spring in the correct length?
I have a similar problem as you, i weigh 160 lbs, and bought a spring from a stock 2017 450, which is a 5.2. Havent ridden it yet, curious to see how it works. I also had too much static sag.
57mm static sag is too much, it shouldnt be over 40mm.
Also, i would always try to keep the rider sag between 100-105mm.
However, if i was you i would at first ride the 4.8 spring and see how it feels.
104 sag and 47 static sag isnt that far off of where it should be.
Ps. Excuse the dirty bike, broken hand at the moment and can't wash it.
Pit Row
You can adjust your clickers to soften the suspension up, also back your high speed dampening out to like 2 maybe 2.25 turns.
You want to be like 35mm of static sag, and 103-108mm of race sag. This is all in my opinion. I would feel uneasy running the longer spring with that much static sag, especially because the longer spring barely has the adjustment on threads of the shock, that is like playing with fire.
Another option for you is to look into other companies than race tech for the springs to get the correct one. If you cant find the exact recommendation, order a spring that is one rating stiffer.
I had put that spring on just to see how close my numbers would be, especially dinner i want even close with the stock spring. Actually if i can find a 4.7, that'd probably be perfect.
thank you for your input!
Post a reply to: Let's see/review those 2019 kx450s