[Clint-137]

Ok well i just put an Athena big bore kit 280cc, hot cam, white bros carbon pro2, power now system, boysen quickshot, and a different airfilter. i still have stock jetting, its an 05', i also life in north texas, any suggestions please??

[Asmith]

Ok well i just put an Athena big bore kit 280cc, hot cam, white bros carbon pro2, power now system, boysen quickshot, and a different airfilter. i still have stock jetting, its an 05', i also life in north texas, any suggestions please??

Yeah,

change your jetting!!

You will probably want to go with a JD jetting kit but you will want to go a little larger on the main. I would think with a big bore AND a Hotcam you will need Probably a 165.

Red Needle 5th clip

#42 Pilot jet.

Try PM'ing Christi20. She did this a little while back and has redone her jetting. See what worked for her.

[Clint-137]

alright, thanx man., ill look into it, but i ordered a fmf jet kit for it. not realizing in the fine print, (use with fmf exhaust), well the biggest jet is a 150. And isnt my stock a 172 or somethin like that?

[Asmith]

alright, thanx man., ill look into it, but i ordered a fmf jet kit for it. not realizing in the fine print, (use with fmf exhaust), well the biggest jet is a 150. And isnt my stock a 172 or somethin like that?

I assumed it was a CRF 250X...Is it an R??

If so then yeah, you will need 178 or 180.

[Clint-137]

ya, sorry its an 2005 crf 250 R, so i will need about a 180?

[Clint-137]

Thanx, i just did that i went up to the local store and bought me a 180 and a 182, but we put the 180 in there and moved the clip, now it runs like a raped ape