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crf 450x jetting

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I have an 05' crf 450x completely stock except for a Twin Air filter. I have read alot of people changing the jetting, do I need to or is the stock setting fine? What advantages comes from changing the jetting? Last, is it hard to do?

sorry for the dumb questions, I am new to this carb. stuff

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More importantly, how does your bike run? Any problems? Nothing to fix if it ain't broke.

Jetting changes are done to resolve running problems. Not hard to do if you are careful, logical and methodical.

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no, the bike runs perfect as far as i can tell. I just didnt know if it was one those "must do" mods.

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High, I have 06 crf450x and did these mods:

162 main jet

clip pos. 5th

fuel screw 1 3/4 out

top of air box cut off

fmf q4

The bike runs great but I was wondering if I should change the leak jet to 65 instead of 70?????

And the pink wire mod, what does that change?????

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I checked my spark plug after a 30 min ride and it was black on the threads and brown on the electrode and the tip of insulator. Is this good?????

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Brown is very good.

insulator needs to be cocoa color,chocolate milk,tan,ect........

good job! I love it when I get the jetting dialed!

time to Ride!! :worthy:

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