On the oil window.after the bike has been warmed up where should the oil rest KTM 450 sx 2003 model

Drain oil. Use degreaser to clean area. Use JB Weld & allow to set up properly before adding oil.

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Thank you for contacting FixYa with your inquiry.
This is a relatively simple process. You should be able to lay the bike over and disassemble the side case cover that's leaking and replace the gasket. You may have some minor interference with the radiator shroud.
http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
If we can be of further service please advise.
Best wishes,
TF

Thank you for contacting FixYa with your inquiry.
Here is a link that will take you to useful information and the manual for this bike.
http://motors-bay.com/ktm/266-ktm-450-smr.html
Here is an alternate site allowing you to download in pdf format. http://safemanuals.com/user-guide-instructions-owner-manual/KTM/450-SMR-_E
This is probably the best site: http://www.pdf-manual.com/user-guide-instruction-owner-manual-ktm-450-smr-supermoto-2004-17823.html
Thank you again for contacting FixYa please advise if we can provide further assistance.
TF

I have looked but am at a loss to find it also.
If you drain the oil, refil it with the same amount and then check the levels adding as required.
Hope this helps.

Yes, I use a full synthetic in my four stroke.

not sure bout the 4 strokes but my 250sx has got a level plug around the water pump. have a look there

Check your owners manual it will tell you how many cc or oz. to add also on alot of the dirt bikes it is stamped how much to add, buy a measuring cup and add per. bike specs.

If you don't have a manual do a internet search for your make and year of bike for how much oil to add.

There is not a dipstick or a sight glass on most dirt bikes...Hope this helps

2 stroke Mx bikes generally have(one or more of) four different methods of checking gearbox oil level.
The most common way to know is it is usually stamped on the clutch cover near the oil filler plug. It will read in CC's. 1cc equils 1ml. Sometimes they have an oil dipstick attatched to the filler plug. They have two lines on them. The bottom line is the lower level, the upper line is the full level.
The third style is an oil window situated at the bottom rear of the clutch cover, again with a high & low mark.
The fourth style is a bolt or screw on the clutch cover(with a alloy/copper/fibre washer behind it. For this type you remove the screw & fill thec gearbox untill oil starts to leak out of it with the bike upright.
Your bike will have one or more of these oil level checking systems.
If your totally unsure, ask your KTM dealer.
Hope this helps
Regards Andrew Porrelli

i wouldnt recommend using 03 valves though thay may work ok initially. each year there are slight changes made to the valve sistems on the ktms this is especially true. if you do use them initially it may be ok but could lead to huge damage to the case

yes, you are correct, those are the two pieces that could solve your problem, but i would go first for your cdi, you may choose to have it tested first also, before you jump out to buy a new one.