2007 cr125 standard jetting

[leeboy 65]

could anyone help me please i have just bought a125 2007 for my son and we are having problems with the plug fouling after about 20 mins or so we run castrol tts oil and denso iridium plugs i have checked the jets and we have a440 in the main and a 55 in the pilot , does anyone have a manual .could anyone let me know which ones should be in there from standard any help would be good as we havnt had much pratice time due to the bike stopping every 20/25 mins thank you

[chud]

Buy a JDjetting kit for the bike, it comes w/ instructions.

[lucahemi]

+1^^^

[shifterkart37]

430 and 55 is what we had new but changed to 400 and 40 .(Sea level alt).How-ever , we still get splutter when the motor warms up.