1996 wr 250 two stroke jetting

[macadue]

if i put a new pipe on my wr250 do i need to rejet it or will it still perform the same w the new pipe

[KcDavis]

Is it the same kind of pipe you had on before or a completely different pipe? You usually have to change the jetting up a little when you put different/after market pipes on. And most pipe manufacturers have recommended jetting.

[macadue]

i believe its a stock pipe on there now and i was thinking about putting a fmf fatty on it but idk if i should or not

[haydenjsle]

I run a FMF Fatty Gold pipe on my 97 WR250--when I was running the stock Mikuni VM carb, I stepped all the way up to a 410 main jet and down on my pilot to a 35. It pulled longer and harder on the top end and ran cleaner and crisper on the bottom end.

Pipe aside--these bikes come jetted way lean on the main from the factory and a little rich on the pilot. Adjust your needle height and air screw as needed. Don't base your jetting on a new pipe--rather how it runs at your altitudes and conditions--use the factory jetting as a starting point.