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Old 05-08-2012, 08:32 PM   #3226
Country Doc
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I had my 09 450 single sumped (and changed to a 520...) by Thumper Racing when it started to burn oil at the 50hour mark. I religiously checked and maintained the oil, valves, etc, but I did not overfill relative to the window as Ned suggested (I filled halfway when cold as indicated in the manual). It was very stable until about 40 hours when it started to smoke and burn oil.

After a new piston and rings and the single sump conversion, I now have 120 trouble free hours (ie 70 hours on the single sump with the new piston). I have no idea whether single sump is really any better or worse, but the small amount of engine oil always struck me as being strange, and the Bergs never incorporated that part of the design.

So, mine seems fine, but that isn't exactly a research study. It doesn't seem to run any different, any cooler, or anything else. But it doesn't burn oil, so I'm happy about that.

dc
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Old 05-08-2012, 09:04 PM   #3227
jesusgatos
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Quote:
Originally Posted by LukasM View Post
I don't know of a single person that has swapped an RFS into a XC4 chassis, the engine mounting points are too different. People are using 07-11 SX-F and XC-F donors, the DOHC engines of those years are definitely problematic and they wear out very quickly. Lots of those bikes being parted out so you can often build a hydrid cheaper than buying a newer EXC-R. The SX-F/XC-F are also reported to handle a bit better, even if only few people will be good enough to really benefit from this - I am certainly not.

That being said I personally do not want an engine that burns oil, which a lot of XC4 owners - even post 08 - seem to have accepted as normal operating procedure. Just glad that I don't have that problem in the XC4 derivative in my FE570, and I also prefer the single sump...
Oh, that makes a lot more sense. Thanks for essplaining.
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Old 05-08-2012, 09:12 PM   #3228
guns_equal_freedom
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Single sump 530 motor?
Contact Dave at DJH Cycle Sport - http://www.djhcyclesport.com/.
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Old 05-09-2012, 11:46 AM   #3229
trav72
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Quote:
Originally Posted by guns_equal_freedom View Post
Single sump 530 motor?
Contact Dave at DJH Cycle Sport - http://www.djhcyclesport.com/.
Thanks.

Anyone know of a write up anywhere explaining what is done to convert to a single sump?
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Old 05-09-2012, 01:24 PM   #3230
guns_equal_freedom
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Originally Posted by trav72 View Post
Thanks.

Anyone know of a write up anywhere explaining what is done to convert to a single sump?
Single Sump 08-11 450-530exc

http://ktmtalk.com/index.php?showtopic=441716&hl=sump

You might need to be a member to view it.
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Old 05-09-2012, 03:45 PM   #3231
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That's the thing with KTMTalk, thousands of answers and opinions for every one question. I just get confused over there.
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Old 05-09-2012, 08:51 PM   #3232
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Originally Posted by bigborefan View Post
That's the thing with KTMTalk, thousands of answers and opinions for every one question. I just get confused over there.
It's like anything else in life, you have to read and make decisions.

If Travis37or DJH post their opinion on a subject you should take note.
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Old 05-10-2012, 12:59 AM   #3233
DRjoe
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thanks for the link mate

joe
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Old 05-10-2012, 11:35 AM   #3234
Krazyjohnny
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strumming lips with fingers...

After reading all of this stuff about single sump vs. dual sump and how much better this motor is than that....I feel the need to get rid of my 08' 530 EXCr and get into an air cooled, under suspended, underpowered "hondama" 250 or something.
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Old 05-10-2012, 12:45 PM   #3235
roastbeef82
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Quote:
Originally Posted by neduro View Post
I studied this alot before Dakar, as you can imagine.

Every catastrophic failure I could find was a result of low oil.

The problem is that an engine can change oil level very quickly, when the rings hit a critical gap, or the valve guide seals lift. The latter failure can take an engine that has never burned a drop, and run it just about out of oil in a tank of gas.

I've come to the conclusion that if you overfill relative to the window, and check it religiously every single time you add fuel, you don't have much to worry about.

I haven't found any credible stories of engine oil going to the tranny on 09-newer bikes, which isn't to say it couldn't happen, but I did a lot of research.
I overfill relative to the window ( just tilt the bike the other way to check its not way over) not noticed any problems --- yet
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Old 05-10-2012, 12:51 PM   #3236
bigborefan
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Quote:
Originally Posted by Krazyjohnny View Post
After reading all of this stuff about single sump vs. dual sump and how much better this motor is than that....I feel the need to get rid of my 08' 530 EXCr and get into an air cooled, under suspended, underpowered "hondama" 250 or something.

How bout a smoking deal on an 08 690E. Those are junk as well.....
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Old 05-10-2012, 12:52 PM   #3237
bigborefan
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Quote:
Originally Posted by roastbeef82 View Post
I overfill relative to the window ( just tilt the bike the other way to check its not way over) not noticed any problems --- yet

Same here, I drain the oil, change the filter and slap in 600CC of premium oil. My window is always full. No problems yet, but mine is still low hours, 40 so far.
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Old 05-10-2012, 05:36 PM   #3238
Johnktm
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Sup fella's
just bought a 09 Ktm 530exc


Plaining on de-smog and adding the JD jet kit. Was wondering what fuel screw to use?
Its a blast to ride. No regrets thats for sure.
Anything else I should do?!
Cheers and Ill sure try to snap more pics.
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Old 05-10-2012, 06:18 PM   #3239
KTM Explorer
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Took off the R&D flex adjust fuel screw.

IMO NOT a good design: threads are too short, and being pushed at an angle by virtue of the design,... well, mine was honked up. Get the JD with the large thumb wheel - mine runs a LOT better now!
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Old 05-10-2012, 06:55 PM   #3240
jesusgatos
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Quote:
Originally Posted by KTM Explorer View Post
Took off the R&D flex adjust fuel screw.

IMO NOT a good design: threads are too short, and being pushed at an angle by virtue of the design,... well, mine was honked up. Get the JD with the large thumb wheel - mine runs a LOT better now!
You're the 2nd person to post something like that about the R&D setup recently, and makes me wonder. Mine works great, and it's been installed on at least three different bikes. Maybe they changed the design or something? But this is an old one, and things usually get better...
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