honda400ex2003
09-28-2013, 07:38 PM
Hey guys,
more of just a common question but based on my 400ex- anyone have a top end bog no matter what you do to it?
not sure where to go with my 400, 3 issues left that are a possibility
jetting, CDI box, or a coil
My 400 will run great until 4th and 5th pinned for a while. it will run about 63 max which is quite slow for my 440. it sputters like it is hitting a limiter, just falls on its face.
list of mods on the 400-
11:1 440cc
200 main, 52 pilot, 3rd notch
450r carb
stage 2 hot cam
full exhaust
k&n intake
I have went from a 170 to a 200 main with the same results on jetting, leading me to think that it is something else. I checked the valves last night, they are good to go and in spec. Took the stator cover off to check for moisture in there, it looked ok as well.
It seems like the coil could be going or the CDI could be getting goofy but it has been doing it since last fall so i would have thought that either of those would have went out by now. im not sure if its the coil, i dont have my stocker any more. I thought i did but dont.
I thought that it was jetting related and still do... i have tried every jet that i have in my box, 170, 172, 175, 178, 180, 182, 185, 188, 190, 192, and drilled my own 200 and 210 to try them out. nothing makes it run any better, but they will make it worse. it ran really sluggish with the 210 so i went back to a 200 and have left it for a few days now.
It does need a 55 pilot on it but that wont effect the top end when it is wound out. it pulls so well up till it is pegged out on a long run that it just has me befuddled.
thought on what it could be? anyone have a CDI and a stock coil that they would either let me borrow or trade some other parts for? I have some extended hubs and stuff that are in my for sale thread that id trade for some new parts.
Thanks,
Steve
more of just a common question but based on my 400ex- anyone have a top end bog no matter what you do to it?
not sure where to go with my 400, 3 issues left that are a possibility
jetting, CDI box, or a coil
My 400 will run great until 4th and 5th pinned for a while. it will run about 63 max which is quite slow for my 440. it sputters like it is hitting a limiter, just falls on its face.
list of mods on the 400-
11:1 440cc
200 main, 52 pilot, 3rd notch
450r carb
stage 2 hot cam
full exhaust
k&n intake
I have went from a 170 to a 200 main with the same results on jetting, leading me to think that it is something else. I checked the valves last night, they are good to go and in spec. Took the stator cover off to check for moisture in there, it looked ok as well.
It seems like the coil could be going or the CDI could be getting goofy but it has been doing it since last fall so i would have thought that either of those would have went out by now. im not sure if its the coil, i dont have my stocker any more. I thought i did but dont.
I thought that it was jetting related and still do... i have tried every jet that i have in my box, 170, 172, 175, 178, 180, 182, 185, 188, 190, 192, and drilled my own 200 and 210 to try them out. nothing makes it run any better, but they will make it worse. it ran really sluggish with the 210 so i went back to a 200 and have left it for a few days now.
It does need a 55 pilot on it but that wont effect the top end when it is wound out. it pulls so well up till it is pegged out on a long run that it just has me befuddled.
thought on what it could be? anyone have a CDI and a stock coil that they would either let me borrow or trade some other parts for? I have some extended hubs and stuff that are in my for sale thread that id trade for some new parts.
Thanks,
Steve