KX250 1976 - standard jetting specs?

[Canam370]

Anyone have the correct standard jetting specs for this model?

[oldfart]

main jet     142.5R
Air jet        0.5
Pilot  jet     45
neddle jet   P-O        clip centre
jet neddle   6DH2-4
air screw     1 turn out
fuel level    38mm  +/-  1mm

Hope this helps

[Canam370]

Thanks for that, helps a heap.   Looks like the jetting is OK. I have to look into the running. Over 1/4-1/3 throttle the thing dies like the slide needle has dropped into the needle jet! OK, now the fun starts - where's the needle hiding in the haystack of possibilities? Another project (but a good one!), sigh......

[oldfart]

What sprocket ratio are you running I'm finding  13 -48 =3.69  is a bit tall and leaning toward 13 - 50 = 3.85.

[Canam370]

Sorry, but I haven't ridden it faster than the pilot jet will allow! Looking forward to be able to give you my opinion at some point!

[oldfart]

Hold on tight with both hands then  as they pull strong down low.

[oldyzman]

OLD fart, do you actually use the air correction jet at 0.5. as i have heard some people run without it at all in 250's and over??
Brett

[211kawasaki]

throw that standard 34mm crap carb away and get a proper Mikuni 36mm, your problems will be solved.

DT