jetting for 416 with stage one cam

[whc]

2007 400ex stock exhaust with modified end cap, knn filter, air box opened up, 416 11 to 1 comp. and a stage one cam, pilot is a 45, main is 160, was a 150 with the engine stock, quad is running strong but the plug is still too clean, wondering what others are running for jetting with these mods. any input is appreciated thanks Bill

[JOHNDOE83]

Heres a thread that describes how to jet by plug reading.

http://www.exriders.com/vbb/showthread.php?s=&threadid=441780

Other then that you should be around 170 main jet.

Its nearly impossible for us to tell you exactly, we can just give a baseline.

[CJM]

I have a similar setup but have an open airbox and a slip on and woundup with 160 and 3 turns out.

[whc]

i a little familiar with reading the plug, am just trying to get in the ballpark, am up to a 160 now plug still looking to clean going to a 165 and raising the needle tonight will post my final results. Bill

[JOHNDOE83]

Most people fail to read the most important part of the plug, youd have to cut the threads off to see it.

Honda400ex2003, AKA steve, did some dyno runs, and I believe for a stock carb with almost the same mods you have, he wound up with a 170.

[honda400ex2003]

mine is in my sig. i suggest around a 170 main to start off with. i ran a stage 1 with 10:1 and dallas honda#4 ran a stage 2 11:1 with the same jetting at around 1200-1500 ft. I think i am right around 1600 actually when rounded lol. steve

[whc]

thanks for info. have not had time to work on her hopfully tonight. yeah I know I should saw the plug but am going to richen her till she blubbers then come back down. with the 160 main she is running good pinging is gone. will post where I end up. my elevation is about 600 feet but we ride to 1600. later Bill

[CJM]

Just for reference:
I just got mine all done FINALLY (steve will laugh at this) and I wound up with 160 and 3 turns out.

I have an 00, 416, stg 2 hotcam, slip on, 11:1 wiseco pistonground header welds and open airbox running 93 octane.

I thought it was to low, but I am also only 150ft above sea level. My buddy who tuned it says I should be fine up to about 1000ft with ease, after that of course less power but I shouldnt notice it to much.

So 160 could be fine for ya, never know.

[honda400ex2003]

there are alot of variables as you have seen from this thread. lol. steve

[whc]

I am up to a 170 main (biggest I have) she is not acting far on top but I think I am close since she does not seem quite as snappy in the mid range, seems like a nice power gain. later bill

[honda400ex2003]

?? what da?? what is acting far? you may need to lower your needle to help with the mid range. imo i would go to the second needle and see how it runs with that. steve