Fe390 suspension for road use

Call Race Tech. They do these setups often and can design a spring/valve combo to suit you.

Send them your forks and shock, and a hefty bill later, you've got a suspension designed specifically to your needs, with OEM tubes and fittings.

Good luck!

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Woah! That's insane. Working from Tapatalk, so I missed your location. Mybad.

Could you have them spec a build and send you the springs, valves, and seals to have a local service tech do the labor?

I admit though, shipping is a PITA. I had to buy a rifle case to ship my fork legs safely. Thankfully this country has an awful gun infatuation, so I could hop down to my local sports ship for my "fork case." Weird.

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FE390 Fork work

This may or. may not help you in Ireland. I live in Durango, CO, USA (southwest corner of the state). We have a GREAT local guy, "HERMOSA RIDE SUSPENSION" is the company, GEORGE VILLANYI is the guys name. He is a one man company, but is revered here for the quality of his work. I had him lower my 2011 FE390 (70 degree) and change the spring rate and increase the shock preload. (I weigh 215 lbs / 6'3"). This rendered a bit stiffer ride on both ends. I was amazed at the difference. (I am 73 years old and ride conservatively, but we do ride some fairly difficult mountain passes - just at a slower pace). YOU COULD CONTACT GEORGE VIA FACEBOOK IF YOU NEED INFO ON SUPPLIERS. That said, I am also street legal and ride the TransAmerican Trail in various sections. The suspension changes George made also work better for street use, even with stock wheels. I rode across Oregon last year, 1/2 off road Jeep trails and 1/2 state highways & paved backroads. Suspension was a really good compromise for my purposes. Good luck with your supermoto!!! -HusaGeezer.

I'm pretty sure the rear spring is standard KTM stuff, as are the forks. The only difference in the rear shock is the orientation of the reservoir. (I'm 85% confident here)
Check some of the KTM forums...there's a ton of info there.
Make sure it's sprung for your weight (ie-preload/sag are correct, and you're not bottoming out, etc) then it a matter of valving/playing with the "clickers" (compression and rebound damping adjustments) You might get by with new springs (pending your weight) and simply increasing the compression and rebound damping a bit.
Good luck! (...love Ireland and N Ireland...spent a lot of time in Belfast)

I do heavy rear springs for them. in stock.
fronts I can get up to .52s.
You need the springs to be to SM spec and lose just 20% onto the wheels (race sag). The damping will be very close....close enough that I wouldn't pay snake oil for anything till i'd tried it.

cheers

Taffy

Main difference between off-road and supermoto is the suspension travel and static position.
If you look at bike manuals the FS suspensions have less travel. Basically you need to shorten the free length of your shock and fork. This can be done by placing a spacer inside.
Spring stiffness are a bit higher on the FS, about 5-10%.
For damping you just need to adjust a bit the settings, no need to change the valving.

do I have an echo here?