November 27th, 2012, 10:39 AM
Joined: Jun 2011
Re: husaberg fs 570 "project"
Don't know yet. Haven't opened up the motor and I have some other things to do before. Hopefully in january-february 2013.
Not worth to bore out the stock TB imo, the design is not that good to begin with. 44mm is the max you can go, then you loose the taper in the bore and then it's basically a pipe with a valve in it = zero flow.
Now when I can compare both the custom 46mm and oem 42mm I can see the reason why oem is not good at all (maybe for enduro to get that instant low end punch and smooth acceleration). The intake lenght is a bit longer with the 46mm and the huge velocity stack aids to flow a bit better. Might be one hella explosion of acceleration when the throttle plate gets opened.
Also the ECU might be the most important addition that I also got. stock ecu lets only map injection and even that with the UST tool does not let to map it with fine resolution maps. Ignition timing is the key to make most power out of the motor and change the charisterics of it. Stock timing is really mild, suited for enduro. Now I have the possibility to map everything, change the rev limiter and also it has built-in quickshifter function and came with sensors to install on the bike.
Nice way to spend 1000€ but life is.