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Discussion in 'Thumpers' started by neduro, Apr 3, 2008.
Did you go OEM or aftermarket piston kit?
I went with the Vertex. The Wossner is also supposed to be really good. The OEM piston lists at over $400, and has the questionable ring design. The Vertex was a little over $200, the Wossner about $175. The Wossner and Vertex are both forged, and the stocker is cast.
I don't think anyone has any criticism for the quality of manufacture of the stock piston, but most experienced engine guys find the oil ring design to be wacky.
Wossner is still not burning any oil in my 450 after 7000+ miles.
Its fun to ask for advice on ADV,if it was me I would search for a really good KTM mechanic and have him look at the whole top end,you've gone to all the trouble of taking it apart,might as well get it done right.
You dont want to guess at it.
How much oil was it really going through? Were you measuring what came out at oil change or checking oil level through the window?Are you 100% sure the leakdown test was done right? People sometimes can mess that up if they dont do it all the time.
From here the ring gaps look nice and tight,bore looks perfect. Replacing a (probably) good piston/rings may be just tossing money away. Internet hype may say you need an aftermarket piston,many get along for a very long time on OEM parts,some even finish the Dakar race on them.
Im told by mechanics that a very quick pass with a diamond hone is the only thing to do with a sprayed/chrome bore. Nothing else will touch its ultra hard surface.
Anything more then 1 fast pass with a diamond hone will remove too much material.
Luckily my 2011 530 uses no oil. I know KTM has changed ring/piston design since 08 and and the 2011 is supposed to hold up well. Im hoping so. Its a fun bike!
My 2009 EXC450 looked exactly the same at 175hrs and was sucking oil like a hungry baby at the bottle! It was an oil burner from new, KTM even put a new piston and rings in at 20hrs. I did the re & re but had Dave Hopkins (djh on KTMTalk) check the bore and go thru the head. Oh yea,my compreesion ring was in three pieces?
My bore was basicly perfect, just select the right size Wosner piston, size the rings and assemble. Dave feels that touching the bore is pointless (unless their damaged or out opf spec) on these plated cylinders.
Dave cleaned up and checked the head, installed new valve seals and opened up the oil pasage in the rocker arm.
My bike now starts and pulls great with no oil consumpion. It was the best $600.00 bucks that I have spent on a bike!
Yep, a diamond hone is necessary for finish sizing. I went with the recommendations of those who know more about it than I do. The brush cleaned up the bore without removing a measurable amount of material. Probably took some material off the brush, though. Rings seated very quickly, and the bike is very noticeably stronger-running.
I like my 530 a lot. It's a much better bike than I am a rider, but it's still not hard to ride. I had been out of the woods for 30 years, and was a little worried that the 530 might be too much; but I'm a big boy, and I also thought that something less powerful, although easier to ride, might get old as my "legs" came back. It turns out to be a really versatile, user-friendly bike that I'll never outgrow.
Ive had faster bigger bore 4 stroke singles, but the 530 is a nice compromise of going like stink,yet being really easy to ride and handles sweet on singletrack or playing flattracker on fireroads. I still ride my 300 in the woods mostly,been on 2 strokes for too long to give em up. + the trails around here are mostly all tighter then tight. The 530 will go through them better then I thought though.
Fantastic thread! I searched through and I see some of you have changed to the CEV multifunction switch. For the time being, I'm okay with the large factory headlight/turn signal switch on my new-to-me '08 450 EXC-R, but I'd like to install a combo start/kill switch. Right now, it has a single start button and I have to turn the key off to kill the engine.
A few years back, I did a full street legal conversion on an '06 EXC using the euro components. I'm fairly certain I used part# 59011074100. If I recall, there are few combo switches that look similar but have different part numbers (59411074000, 59411074100 and 59411074200).
Can anyone verify which start/stop switch would be plug-n-play compatible with the '08?
Sorry, can't help you there ~
But, does anyone know where I can get a small windshield for my '11, 530 EXC?
Most of my aggressive dualsport riding I do standing....need something to help with the wind blast ~ really tires the ole' arms after several hours
Here is the best setup I'm aware of - and it allows you to upgrade your lighting to something that is actually useful.
Thanks for that ~ Now, do I get one or not???????
That is what I was looking for
Well now, THAT is the question, isn't it?
With aggressive dualsporting (ie. a street legal dirt bike), I would break that off in a day.
I like it, but I have a local source as well. Ian makes a great product and lets the fairing move up and down for trail/street.
The Rally Moto Kit on my bike really helps with the wind blast. Makes the 530 a great dualsport, IMHO.
I doubt it. If you hit it hard enough to break it off, you probably have bigger problems to worry about - The one in the picture on the product page has been crashed on repeatedly, and there are hardly any nicks in the paint since the gel coat is so strong.
It's made out of fiberglass and it much more resilient than a carbon fiber layup - and you can repair it fairly simply if you did break it. So the two are pretty equal in that regard. That wimpy little windshield looks pretty weak though.
To each his own though - I'd deal locally as well regardless.
Man, I LIKE that set up. If I ever wanted to take a longish trip on the 530, this would be fantastic.
Hey guys. I have an '08 530 EXc with 6900 miles on it. It had a piston and rings at 3600. I am using quite a bit of oil now. And it is blowing oil out of the engine breather. I have to add 2-3 cups of oil per 150 miles.
Can anyone recommend a good machine shop or shop in So. California? I am in the Orange county area. I can pull it all apart and reassemble it. But time is a little lean with me right now, so if if anyone knows a great shop I might be willing to let them do it all. It will be hard for me to let someone else work on it.
Thanks for the help
Were the rings replaced with oem or aftermarket? Not a whole lot of miles, mine was similar oil usage until I did aftermarket piston/rings. How about valve seals, replaced?
Out the breather doesn't sound like either of those though...
? any idea as to what LED's it could run without upgrading the stator????