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Old 07-01-2018
nelpd96 nelpd96 is offline
dbw Pro
Join Date: Mar 2010
Location: Canberra
Posts: 45
2003 KTM 200sx jetting

Lads, just getting back into riding single and picked up a cheap bike. It seems to run on but I know that jetting can make our break the ride experience in these. It is running the following:

DDJ needle, second clip from the top
180 MJ
38 PJ
Number 7 slide
Air screw is about 3 turns out.
Running 50:1 premix

Bike is running a gnarly pipe and KTM power parts long silencer. Only done a couple of hours on the bike so have not check the power valve setting as yet.

I realise that it is only a 200 so my only complaint is that I would love it too be a little crisper just off idle as it needs a lot of clutch at the moment to get it up.

Will pull the barrel to set squish age check rings after a couple more rides. Don't want to change too much at once.

Cheers Paul
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Old 05-02-2018
nelpd96 nelpd96 is offline
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Join Date: Mar 2010
Location: Canberra
Posts: 45
So it got the better of me and I pulled the head. The top end is somewhat worn so it is going off for a birthday and the reed tips are chipped and cracking so a new set of those on the way.

Keen to get some guidance on the jetting if I can though as the PJ seems a little too small from what I have been reading- either a 42 or 45 seems to be the norm. The DDJ seems to be leaner than is normally run as well. Though it looks like someone has had a go at redoing the taper. The CEK CEJ seems to be a popular choice with the single taper needles.

The carby has S66A2 EJF on the side if that is of any use.

Finally based on the design of the head I think that this may well be an EXC motor not an SX as I was told due to a smaller squish band and slightly larger combustion chamber.
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Old 06-02-2018
RMJay84's Avatar
RMJay84 RMJay84 is offline
dbw Pro Champion
Join Date: Feb 2006
Location: Australia
Posts: 4,963
see how it goes with new reeds first
It pumps one way and then it pumps the other...
you have to know what you're doing with these machines and wear gloves
Current rides: 125 trially, 200EXC, 250EXC, another 250EXC & XR70
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Old 07-02-2018
choppiektm's Avatar
choppiektm choppiektm is offline
dbw Factory Pro
Join Date: Aug 2007
Location: wingham
Posts: 921
DDK is also worth a try
The sudco needle are expensive but worth it
Show n go have them
2008 530
15 rmz450 sons
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