Planet Minis

chase691 · 07-13-2009, 04:03 PM

i have an 03 crf150f with a big gun exhaust and a 26mm carb i need help jetting it any pointers on what i should use for jets and position of the needle

s_10onbagz · 07-13-2009, 11:25 PM

hard for anyone else to say. Every bike is unique. What is your elevation? How does the bike run as is? Idles steady? Revs freely? Pops on deceleration?

simmersm · 07-17-2009, 01:05 PM

i say rejet the stock carb and put it back on there..

87Pitracer · 07-25-2009, 08:58 PM

I've got the exact same bike and I have an old XR200 carb on mine. I think it is 26mm. I have worked on jetting for some time and keep going bigger and bigger. I started with a 42 pilot and 115 main and it ran OK but popped an sputtered a lot. Today I went up to a 50 pilot, middle clip on needle and 125 main. It ran much better, but I still have a little hesitation on the low end. The track was mostly open so I am pinned most of the time. To get more air I also cut out the wire mesh in the air box (pain to do) and bought a Uni air filter. If you have a bigger exhaust, you need to get more air in as well. That's where I am for now but I am still playing around.

07-13-2009, 04:03 PM	#1 (permalink)
chase691 PM Newbie Join Date: Jun 2009 Posts: 4	150f help i have an 03 crf150f with a big gun exhaust and a 26mm carb i need help jetting it any pointers on what i should use for jets and position of the needle

07-13-2009, 11:25 PM	#2 (permalink)
s_10onbagz 3rd Gear Member Join Date: Sep 2007 Location: Connecticut. Posts: 1,550	Re: 150f help hard for anyone else to say. Every bike is unique. What is your elevation? How does the bike run as is? Idles steady? Revs freely? Pops on deceleration?

07-17-2009, 01:05 PM	#3 (permalink)
simmersm 3rd Gear Member Join Date: Jan 2008 Location: Alexandria VA Posts: 1,429	Re: 150f help i say rejet the stock carb and put it back on there..

07-25-2009, 08:58 PM	#4 (permalink)
87Pitracer PM Newbie Join Date: Nov 2008 Location: Hebron, KY Posts: 35	Re: 150f help I've got the exact same bike and I have an old XR200 carb on mine. I think it is 26mm. I have worked on jetting for some time and keep going bigger and bigger. I started with a 42 pilot and 115 main and it ran OK but popped an sputtered a lot. Today I went up to a 50 pilot, middle clip on needle and 125 main. It ran much better, but I still have a little hesitation on the low end. The track was mostly open so I am pinned most of the time. To get more air I also cut out the wire mesh in the air box (pain to do) and bought a Uni air filter. If you have a bigger exhaust, you need to get more air in as well. That's where I am for now but I am still playing around.

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