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September 20th, 2020, 06:32 AM   #1
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From: Alameda, CA

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I Ride: FE570,FS570,450/520XCF SM, SV1000, NC700
Seized FS570

2011 FS570, I believe 6-7k miles on it (gauge isn't original), 6-700mi on the oil (Motorex 5100 IIRC), although it was surprisingly dark. Temps had been reasonable, a little higher than I'm used to (in the 170s, and it was a reasonably cool night, I'm used to seeing 160ish on the highway, but nothing unreasonable). When it cooled down and I popped the radiator cap there was coolant over the fins, so cooling was good (presuming the water pump was working)

I was riding along on the freeway, 65mph, stock gearing (14/3 so fairly low revs. A couple times (over a few miles) it briefly stumbled and then recovered, then it locked up hard, 9mi from "home" (not really home, but where I decided to take it to work on it). I clutched in and coasted to the side and got a tow "home" (a whole different story... AMA towing is downright awful, I called at 11:04pm, they said it'd take about an hour for the truck to arrive and they'd call in an hour 15 to make sure it was there etc, they called at 12:54am, said it would be another 45 minutes, they called at 1:35am, said it would be another 40 minutes, they eventually arrived at 2:17am, the truck bed was covered in oil so he put down a little kitty litter but I don't know I trust the tires, better to replace them than to crash).

I now see 3 basic options:
1) Sell the bike as is
2) Tear it down, if parts are in decent shape do a basic build: the cases need to come apart to inspect parts in the bottom end, so I'd probably go 610, but other parts pretty much stock unless there's something that really warrants upgrading. If the head and crank are decent, this is the most likely scenario.
3) Do a balls to the wall build, probably a 662. If the crank is bad, why not go stroker. If the head is bad, probably find a 12-15 450SXF/XCF head. I don't want a total high RPM screamer so I'd probably stick with the stock cam for that head. Would this be a reasonable street engine? This isn't a track bike, I have something else for that. I want something with reasonable longevity and moderate maintenance schedule (I mean, all 570s are fairly high maintenance, my point is I don't want an engine that needs rebuilds/maintenance a few times as often as stock)

Bike is relatively stock: it has a pipe, a fuel unit (I forget the brand, one of the ones everyone makes with 3 buttons), handguards, etc... nothing crazy.

In any of the cases, I'll probably at least pull the engine and cam cover first so I can see how bad it is. Is there a good guide somewhere for dropping the engine? About what does it weigh?
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September 20th, 2020, 03:32 PM   #2
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From: Australia, Beechworth, Vic.

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I Ride: when I can which isn't often enough. FX450, FE570
Low hours for one of these. Do a strip before you make a decision.

Pull the oil screens out and check.

Most heads are repairable. If yours isnt, as you say one from a KTM will do. You just have to drill and tap for the oil line. Not a biggie.

If i had to split the cases id be def going 610. I have one and will be building up a second one soon. Mine does have a ported head and its a beast. Use a lighter Wossner piston pin than what comes with the CP piston kit. The bloody thing is an anchor!

Yes a 660 would be nice. This or if you rebuild the crank you can run the KTM ProX conrod kit for the KTM. It does run a 19mm pin against the 20mm Husaberg but not a biggie. Then you run the 610 kit for the Toom. The thing i like about the 660 crank is it is 30% lighter which lessons the gyroscopic effect. Get the head cleaned up in the ports.

The more cc’s you run the ‘smaller’ the cam becomes. Im only running the 570 in my 610. Performance cams have basically been non existent. Speak to Thumperracing. I think they may have started doing cams again. Problem is you need a later model cam which may add more money if your cam is the early decomp fuckup.

The fuel controller would be a Dobek. Many put their name sticker on them ie JD tuner and EJK. Run these with the map switch.

Join KTMtalk.com as Thumperracing give you a 10% discount for being a memeber.

Also these Berg are very restricted at the airbox. Disgusting actually. They need opening up. Ive done mods to the seat and shrouds and hard to tell they are different from OEM but allow plenty of flow.

Last edited by Alan; September 20th, 2020 at 03:40 PM.
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September 20th, 2020, 04:54 PM   #3
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I Ride: 8 Berg’s 2005-2011 2 Husky’s 1986&7 2009 Buell & 2006 Ducati
If you decide to sell it PM me.
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September 22nd, 2020, 04:37 AM   #4
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I Ride: FE570,FS570,450/520XCF SM, SV1000, NC700
Part of why I want to go with the newer head is there are far more cam options.

I might be willing to sell it, no clue how much it's worth though
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September 23rd, 2020, 01:16 AM   #5
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I Ride: 8 Berg’s 2005-2011 2 Husky’s 1986&7 2009 Buell & 2006 Ducati
I could come by and We can talk? Retired so most anytime
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