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Jetting Question

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I am going to get a Fmf Q4 pipe and want to know if I have to jet the bike. My bike is a crf230f and I am in ny. My bike is stock now. Thanks

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it'll be ok stock if you don't open up the airbox, you should look into the honda "power up" jetting and uncork the airbox too.

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Get your exhaust, get a uni air filter, remove the air box snorkel, and put in a bigger main and pilot jet, will start much faster and run better/faster too

i had a 42 pilot ( i think) and a 132 main in mine, ran great.

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So if I keep the stock air filter, remove the snorkel, put a fmf q4 exhaust on what jets should I use. I am in long island, ny, but will ride upstate ny and pa. Don't know the exact altitude. Temps are from 30F to 95F. My bike is an 03 and bros is a 09.

Are these jets right...

For 2003 Crf230f

main jet: 132

pilot: 45

stock needle: in 4th position

For 2009

main jet 132

pilot 45

power needle: position ?

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So if I keep the stock air filter, remove the snorkel, put a fmf q4 exhaust on what jets should I use. I am in long island, ny, but will ride upstate ny and pa. Don't know the exact altitude. Temps are from 30F to 95F. My bike is an 03 and bros is a 09.

Are these jets right...

For 2003 Crf230f

main jet: 132

pilot: 45

stock needle: in 4th position

For 2009

main jet 132

pilot 45

power needle: position ?

try a 125 main or so in the winter and put the clip on the needle in the same spot.

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I do not want to switch the jets for different weather. I ride mostly in warm, only a little in the cold. If I do not get the peak performance in the cold it is ok. As long as the engine will not be damaged. I think I am going to go with the 132 main jet and 45 pilot with the power up needle.

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A 120 or 122 main 45 pilot raise the needle if you can.

132 is too fat. It'll run OK but the 120 will give you better response from mid up.

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