Oh Crap, I Broke The Main Jet Off!

[the-ex-files]

Well I was tightening in the main jet, and I guess it doesn't take much, because I broke it off in the really big jet. D'OH!!!!!!!!!!! Now all the threads off the 165 main are stuck in the big jet. So I guess I need a new big jet. What is the proper name for the jet, since I will need a new one. Other then that things wen't pretty smooth, since it was my first time jetting my 400EX. What else do I have to adjust besides the jets? I always hear talk about adjusting the neddle up and down but I don't how or where it is. Thanks for all the help! Sorry for all the questions.

[stupid driver]

In service honda's diagram, they call it the needle jet holder. They want 11 bucks for one too :rolleyes:

[toby400ex]

If ur only problem is that the broke off threads are in the jet holder, take a knife or scissors into the broke off threads and turn it, they come out easy, ive done it a few times before:rolleyes:

[Out_Sider]

^---- try that......BTW your now suppose to have it tightend more than your hand can tighten it

[cals400ex]

yeah, if you can, clean out the threads. however, if the needle jet holder is broke i would definately replace it. this piece makes a difference in power if it is adjusted wrong. the stock needle will have a clip in the 3rd notch. if it is cold outside, i like my needle in the 4th notch. this will raise the needle making your air/fuel ratio more rich between 1/8 and 3/4 throttle.

check this thread out:

http://www.exriders.com/vbb/showthread.php?threadid=64555&highlight=needle+holder

[the-ex-files]

Thanks, I was able to get the broken threads out. Now all I need is a new 165 main jet. Should I raise my needle to richen it up? I added a Curtis Sparks X-6 complete exhaust and will run a Uni filter will no lid. Elevation is under 1000ft. I also added a 42 pilot, and took the choke out. For a main I will try a 165. Does my jetting sound about right? Thanks again.

Make sure to torque it down to 300 foot pounds this time and not 600 pounds....:o

Originally posted by Rico
Make sure to torque it down to 300 foot pounds this time and not 600 pounds....:o

lol :D

[the-ex-files]

Thanks Rico.:rolleyes:

Originally posted by the-ex-files
Thanks Rico.:rolleyes:


Hey no problem, glad I could help...:blah:

[cals400ex]

Originally posted by the-ex-files
Thanks, I was able to get the broken threads out. Now all I need is a new 165 main jet. Should I raise my needle to richen it up? I added a Curtis Sparks X-6 complete exhaust and will run a Uni filter will no lid. Elevation is under 1000ft. I also added a 42 pilot, and took the choke out. For a main I will try a 165. Does my jetting sound about right? Thanks again.


your mainjet seems pretty close. i probally would be down a size or two, but the temp makes a difference there. yes, if it is cold i would raise the needle to the 4th position. good luck