TE/TC 2014 TC jetting.

i cannot seem to figure out my jetting issue. i foul plugs like no tomorrow. running my gas to oil ratio at 55:1. i have a full FMF system on it. it does not like 4000 foot elevations and above. any advice?

Have you used the manual just for a starting point ? The bikes are generally set up rich so riding at elevation will make the bike run worse.

I personally would drop the main jet a size or two, raise the needle a clip to lean it out ( i.e. physically lower the needle... maybe #2 clip position ) and see how you go....I am assuming you are running the stock jetting and stock needle .

Yes jetting is 100% stock. Ive heard people take Suzuki RM 250 factory jetting and put it in the huskys and i guess it works great

I was fouling plugs on a TE with quite lean jetting specs so I adjusted the float height - lowered it when correct way up or raised height from level of carb bowl .
1 to 2mm - eg 7mm to 8.5mm to 9mm .
I have 165 main 38 pilot and N8RJ or K needle
The Suzuki NECJ needle was possibly richer overall. That needle doesn't seem as responsive down low - a bit lean but richer after that . Does make more power mid to top .
Needs that 38 or 40 pilot though . Seen lots of discussion with similar results and a dyno test