Tuning crf stocker

[lil_fmx_kid]

I've just installed an exhaust, air uni filter and cam in my 2012 crf50 but I can't get it to run right now. Bogs down when I hit the throttle. There's no leaks on the inlet but I did notice a small exhaust leak. Was thinking maybe a bigger main jet?

 

[timeeh]

Bigger pilot to start (if it's bogging off idle) then if it bogging from mid-top end then change the needle height first then your main. Although before doing any of that try adjusting your air/fuel screw and see what difference that makes.

 

[lil_fmx_kid]

I've played with the air/screw mixture and made no difference what so ever. Can the pilot be changed in the stock carby? Read they were pressed in but I'll have a look

 

[lil_fmx_kid]

Just pulled my spare carby apart and the pilot is pressed in and the main jet is change able

 

[timeeh]

^After a bit of reading I believe your right So your stuck with adjusting the needle height then main jet.

 

[lil_fmx_kid]

Yeh so that makes it pretty hard

 

[timeeh]

Try raising your needle first and you'll probably want to screw the air/fuel in so it's only around 1/4 of a turn out.

 

[lil_fmx_kid]

Ok thanks I'll have a shot at that. I've already lifted the needle but I only tried adjusting the screw out and buy to standard