needle choice

[clw]

NEDH and NEDW, $12 including shipping for either one

[Rob_NZ]

Originally Posted by Jakobi

13383-37FM0 - NEEDLE, JET (NEDJ) - Suzuki OEM Parts

From a 2008 RM250. I agree that ours are the inbetweeners.

My current conditions here at the top of Aus are: 32C, 65% RH. Still riding at 300M and up to 1000M. 40P NEDJ#2 172M, on a 2010 EC300 with 38mm ASII. Wossner Forged Piston and rings (~20hrs). S3 Head running black (high high) insert. Squish 1.8mm using gasket stack to set port timing flush with port at BDC. 98RON fuel.

My bike is stock, 95 Ron (compression not that high, no point running 98, it may run worse) , sea level to 600M occasionally. 15-25 deg C here.
Bike only has 30hrs on it due to me getting injured. Im back riding now.

Did you ever run that needle with the stock head?

[Jakobi]

Negative.

My sweet setup on the stock head was 38 N3CH#2/N3EH#2 175/178 depending on season. Even then it had trouble idling and was a bit rich transitioning onto the needle. The J diameter with a 40/42 would be my choice for best idle and off idle response. I have tried everything from F-J with all pilots.

I found that the high compression head made about a half a clip difference in the jetting, with me having to go a little bit richer to get the same sound/throttle response. It just stronger and a bit crisper/cleaner with the new head. Ie uses the fuel more efficiently to make more power.

[Rob_NZ]

It took a while, but I now have the NEDJ in my 2010 300 with 38mm AS-II carb.

It seems good, no more 1/8-1/4 throttle rich burble.