OzVMX Forum

Marque Remarks => Kawasaki => Topic started by: Canam370 on April 01, 2013, 04:48:17 pm

Title: KX250 1976 - standard jetting specs?
Post by: Canam370 on April 01, 2013, 04:48:17 pm: Anyone have the correct standard jetting specs for this model?
Title: Re: KX250 1976 - standard jetting specs?
Post by: oldfart on April 01, 2013, 05:13:37 pm: 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
Title: Re: KX250 1976 - standard jetting specs?
Post by: Canam370 on April 01, 2013, 08:02:56 pm: 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...... :D

(http://i640.photobucket.com/albums/uu123/canam370/IMG_1204_zpsb7fe8fad.jpg)(http://i640.photobucket.com/albums/uu123/canam370/IMG_1201_zps3d84a2ce.jpg)
Title: Re: KX250 1976 - standard jetting specs?
Post by: oldfart on April 01, 2013, 08:17:11 pm: What sprocket ratio are you running ??? I'm finding 13 -48 =3.69 is a bit tall and leaning toward 13 - 50 = 3.85.
Title: Re: KX250 1976 - standard jetting specs?
Post by: Canam370 on April 01, 2013, 08:30:21 pm: 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! ;D
Title: Re: KX250 1976 - standard jetting specs?
Post by: oldfart on April 01, 2013, 08:40:00 pm: Hold on tight with both hands then ;) as they pull strong down low.
Title: Re: KX250 1976 - standard jetting specs?
Post by: oldyzman on April 01, 2013, 08:43:37 pm: 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
Title: Re: KX250 1976 - standard jetting specs?
Post by: 211kawasaki on June 26, 2013, 09:12:17 pm: throw that standard 34mm crap carb away and get a proper Mikuni 36mm, your problems will be solved.

DT