250r jetting ??

[250rquadracer]

Hey i got a 86 250r with a
*khenin 36 carb
*curtis sparks pipe
*.60 bored over
*boysen reeds
*k&n air filter (no air box)

i run 50:1....silkolene oil

What do use guys think the size of the main jet and pilot jet should be because i seem to be fauling spark plugs alot

i would like to know what jet size u prefer i should have

thanks
dave

[hondafox440]

What are your current settings? 50:1 is extremely lean for an oil. I would not trust running that. I suggest getting some Mobil 1 MX2T premix. By far the best lubricating and clean burning oil I have come across. What you should do is switch to 32:1 (either with your current oil or MX2T), and assess the jetting from there. Fouling plugs is usually due to a rich piliot circuit.