Jet needle FCRMX-39

[steveyb]

Gidday. I am in need of a jet needle or two that are richer than the standard one that comes with the carb in the KTM 250SXF.
Standard is OBETP, want a couple that are richer all over, esp in the early throttle response area, such as an OBEKP or OCEMR(?).
Would also be keen on richer idle jet too.
Anyone have anything?

[neil_cb125t]

I ll have a look at the old FCR stuff i have - my crabbies were 33s though, so my be the wrong size.

[steveyb]

Hey dude. The FCR-MX uses a different needle entirely to the downdraft FCR.
Cheers anyway!

[Yow Ling]

Glen Skattchill may be able to help you, but he would have to make from scratch

[Bert]

Glen Skattchill may be able to help you, but he would have to make from scratch

http://www.jetsrus.com/a_jets_by_carburetor_type/needle_keihin_N427-OC_FCR_35-41mm.html
Not quite sure what/where your needle numbers have come from?

[steveyb]

Hey. Yep I have that chart.
It would seem that the OB series are no longer available, perhaps.
Maybe they found that they are too lean?? That is why KTM changed in 2009 to the OC series.
I have compared needles with FCR downdrafts and thought they were different. Perhaps I was looking at the wrong needles??
Trying to figure what will work is a bit like stabbing in the dark.
I might whip round to RichBans and have another looksee.

[Bert]

Hey. Yep I have that chart.
It would seem that the OB series are no longer available, perhaps.
Maybe they found that they are too lean?? That is why KTM changed in 2009 to the OC series.
I have compared needles with FCR downdrafts and thought they were different. Perhaps I was looking at the wrong needles??
Trying to figure what will work is a bit like stabbing in the dark.
I might whip round to RichBans and have another looksee.

Take the good vernier and actually measure them correctly. Don't eyeball them :niceone:

[richban]

Hey. Yep I have that chart.
It would seem that the OB series are no longer available, perhaps.
Maybe they found that they are too lean?? That is why KTM changed in 2009 to the OC series.
I have compared needles with FCR downdrafts and thought they were different. Perhaps I was looking at the wrong needles??
Trying to figure what will work is a bit like stabbing in the dark.
I might whip round to RichBans and have another looksee.

OEM Needle numbers seldom match the sudco charts. Best thing to do is measure it and then match it to the proper chart. I have plenty of needles here. I am having to do this with the PWK YZ250 carbs on the 300.